These are all the sources that I used in The Size Comparison (2021). The error range is high for many objects, as there are several values published. Additionally, record holders for the smallest and largest objects are subject to change as new discoveries are made. If you find any errors or disagree with my information, leave it in the comments section.
Sources - The Size Comparison (2021)
Planck Length - https://physics.nist.gov/cgi-bin/cuu/Value?plkl
Quantum Foam - https://universe-review.ca/R01-07-quantumfoam.htm
String - https://www.pbs.org/wgbh/nova/physics/sense-of-scale-string-theory.html
OMG Particle - http://articles.adsabs.harvard.edu/pdf/1995ApJ...441..144B
Neutrinos - https://masterclass.icecube.wisc.edu/en/learn/detecting-neutrinos
Electron - http://cms.web.cern.ch/content/story-universe (Elementary particles dont really have "sizes", so I used the quantum wavelength. A 1E-18 meter wavelength is typical of a 100 GeV electron.)
Quarks - https://archive.org/details/elementarypartic00grif/page/n149/mode/2up (This one is a bit confusing, but the most common physicist's trick is to Google search "hbar*c / [insert effective mass here]")
Range of the Weak and Strong Interactions - http://hyperphysics.phy-astr.gsu.edu/hbase/Forces/funfor.html
Proton - https://www.psi.ch/en/media/our-research/proton-size-puzzle-reinforced
Atomic Nuclei (Helium Nucleus, Chlorine Nucleus, Uranium Nucleus) - http://discovery.phys.virginia.edu/research/groups/ncd/dldata/rms_pdf.pdf
EM Wavelengths (Gamma Ray, X-Ray, Ultraviolet, Visible, Infrared, Microwave, FM, AM) - http://labman.phys.utk.edu/phys222core/modules/m6/The%20EM%20spectrum.html
Atomic Radii - https://periodictable.com/Properties/A/VanDerWaalsRadius.v.html
Transistor - https://www.technologyreview.com/2016/10/07/157106/worlds-smallest-transistor-is-cool-but-wont-save-moores-law/
Glucose - https://bionumbers.hms.harvard.edu/bionumber.aspx?id=106979
Porcine Circovirus - https://www.sciencedirect.com/science/article/abs/pii/S0021997509003879?via%3Dihub
Ribosome - https://www.microscopemaster.com/ribosomes.html
SARS-CoV-2 - https://pubmed.ncbi.nlm.nih.gov/25720466/
Bacteriophage - https://www.google.com/url?q=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC3936114%2F&sa=D&sntz=1&usg=AFQjCNGlSEN-Ypq6FTadfdUVbl2bY1uScg (The size presented in the video is the largest ever discovered.)
Mycoplasma genitalium - http://www.google.com/url?q=http%3A%2F%2Fwww.madsci.org%2Fposts%2Farchives%2Fsep2001%2F1001464156.Gb.r.html&sa=D&sntz=1&usg=AFQjCNFoIey6Ug9osKpUoQhwu5WMQ08LWQ
Pelagibacter ubique - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5244296/
Mitochondrion - https://www.biologydiscussion.com/cell-biology/the-size-shape-and-structural-organization-of-mitochondria-membrane/3891 (Yes, I spotted the mistake in the caption).
Chromosomes - https://www.ncbi.nlm.nih.gov/books/NBK26834/
Pithovirus - https://www.pnas.org/content/111/11/4274
E. Coli - http://book.bionumbers.org/how-big-is-an-e-coli-cell-and-what-is-its-mass/
Cell Nucleus - http://www.cytochemistry.net/cell-biology/nucleus2.htm
Red Blood Cell - https://books.google.com/books?id=cHAjsUgegpQC&q=erythrocyte%20size&pg=PA100#v=snippet&q=erythrocyte%20size&f=false
Myxobolus szekeli - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3235390/
Cell - https://www.chegg.com/homework-help/questions-and-answers/many-cells-human-body-maintain-electric-potential-difference-across-cellular-membranes-typ-q76286229; https://moosmosis.org/2015/09/17/size-scales-of-cell-biology/ (Cells vary greatly in size, from 200 micron fat cells to 8.2 micron red blood cells. This is a lowball estimate, and is by no means a definitive measure).
Human Hair Width - https://hypertextbook.com/facts/1999/BrianLey.shtml
Thickness of Paper - https://hypertextbook.com/facts/2001/JuliaSherlis.shtml
Visible to Unaided Eye - https://www.guinnessworldrecords.com/world-records/smallest-visible-object/?fb_comment_id=557264831040733_672228922877656#:~:text=The%20resolving%20power%20of%20the,an%20inch%20or%202.5%20cm
Human Ovum -https://www.ncbi.nlm.nih.gov/books/NBK26842/
Paramecium - https://microscope-microscope.org/pond-water-critters-protozoan-guide/ciliophora/paramecium/
Dust Mite - https://analyticalsciencejournals.onlinelibrary.wiley.com/doi/pdf/10.1002/elps.200410353
Salt Grain - https://www2.palomar.edu/users/warmstrong/pinhead.htm#grain
Amoeba - https://www.arcella.nl/amoeba-proteus (Remember how amoebas are shapeshifters? This means even a single species has a wide size range).
Thiomaragarita Namibiensis - https://web.archive.org/web/20100120043846/http://www.mpg.de/english/illustrationsDocumentation/documentation/pressReleases/1999/news17_99.htm
Rice Grain - http://www.fao.org/3/t0567e/t0567e07.htm
Ant - https://mississippientomologicalmuseum.org.msstate.edu/Researchtaxapages/Formicidaepages/genericpages/Camponotus_nearcticus.htm#.VKPm2iuUdvo (There are over 12,000 species of ants, so there's got to be at least one in your area that matches this length)
Centimeter - I'm sorry, what are you expecting? It doesn't take Sherlock Holmes to figure it out, jeez.
U.S. Penny - https://www.usmint.gov/learn/coin-and-medal-programs/coin-specifications
Glass Marble - https://www.moonmarble.com/t2-marbleinfo.aspx (The measure in the video is the standard 25 mm size.)
Inch - https://www.nist.gov/pml/weights-and-measures/si-units-length
Egg - https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1745-4530.2008.00263.x (Typical commercial chicken egg)
Banana - https://www.healthline.com/nutrition/bananas-calories-carbs#TOC_TITLE_HDR_2 (Bananas come in many sizes, maing them unfortunately not good for scale.)
Earthworm - https://www.nationalgeographic.com/animals/invertebrates/facts/common-earthworm
Dog - https://www.akc.org/dog-breeds/labrador-retriever/ (I used the labrador retriever, the most popular breed, but there's no one-size-fits-all measurement.)
Human - https://ourworldindata.org/human-height (This is the average, not the ideal for everyone.)
African Bush Elephant - https://www.elephantsforafrica.org/elephant-facts/#:~:text=Facts%20about%20Elephant%20Size&text=The%20largest%20African%20elephant%20ever,the%20average%20male%20African%20elephant
Giraffe - https://zooologist.com/how-tall-is-a-giraffe/
House - https://www.planning.org/pas/reports/report237.htm (Have fun with yet another average).
T. Rex - https://www.eurekalert.org/pub_releases/2019-03/uoa-upr032219.php
Blue Whale - http://aquaticcommons.org/1417/2/NOAA_Tech_Rpt_NMFS_CIRC-396.pdf
Oak Tree - https://www.srs.fs.usda.gov/pubs/misc/ag_654/volume_2/quercus/alba.htm
Maraapunisaurus fragilimus - http://gspauldino.com/Titanomass.pdf
Football Field - https://www.dimensions.com/element/american-football-field
Internation Space Station - https://www.nasa.gov/feature/facts-and-figures/
Hyperion Redwood - https://ourplnt.com/tallest-tree-world-hyperion/
Great Pyramid of Giza - https://www.britannica.com/topic/Pyramids-of-Giza
RMS Titanic - https://www.history.com/topics/early-20th-century-us/titanic
Eiffel Tower - https://www.skyscrapercenter.com/building/wd/9410
Burj Khalifa - https://www.burjkhalifa.ae/en/the-tower/facts-figures/
Boeing Everett Factory - https://www.aerotime.aero/12860-the-stories-about-everett-factory-myths-vs-truth
Central Park - https://www.britannica.com/place/Central-Park-New-York-City
Large Hadron Collider - https://home.cern/science/accelerators/large-hadron-collider (The circumference if you roll out the track is 27 km, and 27 ÷ π ≈ 8.5)
Mt. Everest - https://www.nationalgeographic.com/science/article/new-height-of-mount-everest-announced-by-china-and-nepal
Mariana Trech Depth - http://ccom.unh.edu/sites/default/files/publications/Gardner-et-al-2014-Challenger-Deep.pdfhttp://ccom.unh.edu/sites/default/files/publications/Gardner-et-al-2014-Challenger-Deep.pdf
Deimos - https://solarsystem.nasa.gov/moons/mars-moons/deimos/by-the-numbers/
Halley's Comet Nucleus - https://astrosociety.org/education-outreach/programs.html
Phobos - https://solarsystem.nasa.gov/moons/mars-moons/phobos/by-the-numbers/
Neutron Star - https://arxiv.org/pdf/1912.05705.pdf
Chicxulub Impactor - https://arxiv.org/pdf/1403.6391.pdf
Grand Canyon - https://www.nps.gov/grca/learn/management/statistics.htm
Vesta - https://www.britannica.com/place/Vesta-asteroid
Ceres - https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=Ceres
United Kingdom - https://www.reference.com/geography/length-great-britain-7509927a91697c9c
Sedna - https://ui.adsabs.harvard.edu/abs/2012A%26A...541L...6P/abstract
Makemake - https://ui.adsabs.harvard.edu/abs/2013ApJ...767L...7B
Haumea - https://ui.adsabs.harvard.edu/abs/2019ApJ...877...41D
Eris - https://meetingorganizer.copernicus.org/EPSC-DPS2011/EPSC-DPS2011-137-8.pdf
Pluto - https://solarsystem.nasa.gov/planets/dwarf-planets/pluto/by-the-numbers/
India - https://en.wikipedia.org/wiki/Geography_of_India
The Moon - https://solarsystem.nasa.gov/moons/earths-moon/by-the-numbers/
United States - https://www.reference.com/geography/width-united-states-c316bd62b1fa8556
Ganymede - https://www.lpl.arizona.edu/~showman/publications/showman-malhotra-1999.pdf
Mars - https://solarsystem.nasa.gov/planets/mars/by-the-numbers/
Venus - https://solarsystem.nasa.gov/planets/venus/by-the-numbers/
Earth - https://solarsystem.nasa.gov/planets/earth/by-the-numbers/
Sirius B - https://iopscience.iop.org/article/10.1086/305489
Planet Nine - https://www.sciencedirect.com/science/article/abs/pii/S037015731930047X?via%3Dihub
Neptune - https://solarsystem.nasa.gov/planets/neptune/by-the-numbers/
Uranus - https://solarsystem.nasa.gov/planets/uranus/by-the-numbers/
Saturn - https://solarsystem.nasa.gov/planets/saturn/by-the-numbers/
Teide 1 - http://www.exoplanetkyoto.org/exohtml/A_All_Exoplanets.html
Jupiter - https://solarsystem.nasa.gov/planets/jupiter/by-the-numbers/
Proxima Centauri - https://www.aanda.org/articles/aa/abs/2019/03/aa34371-18/aa34371-18.html
Earth-Moon Distance - https://cneos.jpl.nasa.gov/glossary/LD.html
HD 100546b - https://exoplanets.nasa.gov/exoplanet-catalog/6713/hd-100546-b/
Toliman (Alpha Centauri B) - https://arxiv.org/pdf/1610.06185.pdf
The Sun - https://arxiv.org/pdf/1203.4898.pdf
Rigil Kentaurus (Alpha Centauri B) - https://arxiv.org/pdf/1610.06185.pdf
Sirius - https://arxiv.org/pdf/astro-ph/0507523.pdf
Pollux - https://arxiv.org/abs/1712.08109
Sagittarius A* - https://science.sciencemag.org/content/304/5671/704.pdf-extract
(Mass of Sagittarius A* = 4 x 10^6 Solar Mass
Schwarzschild radius = 11,816,117 km
Diameter = 23,632,234 km)
Arcturus - https://arxiv.org/pdf/1109.4425.pdf
Aldebaran - https://arxiv.org/pdf/1505.03454.pdf
Rigel - https://arxiv.org/pdf/1201.0843.pdf
Earth-Sun Distance (Astronomical Unit) - https://www.iau.org/static/resolutions/IAU2012_English.pdf
Pistol Star - https://arxiv.org/pdf/1403.5298.pdf
Antares A - https://arxiv.org/pdf/1304.4800.pdf
Betelgeuse - https://arxiv.org/abs/2006.09837
VY Canis Majoris - https://arxiv.org/abs/1203.5194
UY Scuti - https://arxiv.org/abs/1305.6179
Note: This value was based on an angular diameter and distance of 2.9 kpc. Gaia Data Release 2 suggests a distance of 1.55 kpc and a consequently smaller radius of 755 R☉. However, the Gaia parallax is considered unreliable (until further observations) due to a very high level of astrometric noise. So I will punt you into UY Scuti if you comment that the measurement is wrong.(https://www.aanda.org/articles/aa/full_html/2018/08/aa33051-18/aa33051-18.html)
Stephenson 2-18 - https://iopscience.iop.org/article/10.1088/0004-637X/760/1/65/pdf
Quasi-Star - https://www.newscientist.com/article/dn12982-biggest-black-holes-may-grow-inside-quasistars/?ignored=irrelevant#.Ut1FCftwHs0
The Solar System - https://iopscience.iop.org/article/10.1086/304912 (This definition of "solar system" marks the end at the Kuiper belt. In hindsight, a more accurate definition would be at the Heliopause 121 AU out).
Light Day, Light Year - https://www.sciencedirect.com/topics/engineering/speed-of-light-in-vacuum
TON 618 - https://arxiv.org/pdf/astro-ph/0406559.pdf
NGC 7027 - https://books.google.com/books?id=a6VY0Q1zsJoC&pg=PA514#v=onepage&q&f=false
Cat's Eye Nebula - https://arxiv.org/pdf/astro-ph/9907313.pdf
Homunculus Nebula - https://arxiv.org/pdf/1406.6297.pdf
Ring Nebula -http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=M+57 (Radius = distance × sin(angular size / 2) = 2.3 (+1.5/−0.7) kly * sin(230″ / 2) = 1.3 (+0.8/−0.4) ly)
Oort Cloud - https://solarsystem.nasa.gov/solar-system/oort-cloud/overview/
Pillars of Creation - https://www.nasa.gov/image-feature/the-pillars-of-creation/
Helix Nebula - https://arxiv.org/abs/astro-ph/0407556
The Spire - http://annesastronomynews.com/photo-gallery-ii/nbulae-clouds/the-spire/
Messier 71 - https://academic.oup.com/mnras/article/406/3/2000/978739
North America Nebula - https://www.constellation-guide.com/north-america-nebula/ (Radius = distance × sin(angular size / 2) = 1.6 kly * sin(120 arcminutes / 2) = ~27.9 ly)
Eagle Nebula - https://www.nasa.gov/feature/goddard/2017/messier-16-the-eagle-nebula
Omega Centauri - https://arxiv.org/pdf/astro-ph/0509228.pdf (Radius = distance × sin(angular size / 2) = sin(36 arcminutes) * 15,800 ly = 86 ± 6 ly)
Segue 1 - https://iopscience.iop.org/article/10.1086/509718
Barnard's Loop -https://www.nasa.gov/mission_pages/planck/planckorion20100426.html
Great Nebula in Carina - http://www.atlasoftheuniverse.com/nebulae/ngc3372.html
Tarantula Nebula - http://www.messier.seds.org/xtra/ngc/n2070.html
Small Magellanic Cloud, Large Magellanic Cloud - https://www.nasa.gov/mission_pages/swift/bursts/magellanic-uv.html
Triangulum Galaxy - https://iopscience.iop.org/article/10.3847/1538-3881/aa79f3/pdf
The Milky Way - https://www.aanda.org/articles/aa/full_html/2018/04/aa32880-18/aa32880-18.html
Andromeda Galaxy - https://arxiv.org/pdf/astro-ph/0602604.pdf
Virgo A (M87) - https://arxiv.org/pdf/0905.1958.pdf
IC 1101 - https://scholarship.haverford.edu/cgi/viewcontent.cgi?article=1025&=&context=astronomy_facpubs
Local Group - https://imagine.gsfc.nasa.gov/features/cosmic/local_group_info.html
Virgo Supercluster - https://www.aanda.org/articles/aa/abs/2007/47/aa8037-07/aa8037-07.html
Distance to the Great Attractor - https://www.nasa.gov/mission_pages/hubble/science/great-attractor.html
Laniakea Supercluster - https://slate.com/technology/2014/09/laniakea-our-local-supercluster.html
Distance to the Shapley Supercluster - http://www.whillyard.com/science-pages/superclusters.html
Pisces-Cetus Supercluster Complex - https://ui.adsabs.harvard.edu/abs/1986ApJ...303...25T/abstract
Sloan Great Wall - https://arxiv.org/abs/astro-ph/0310571
Hercules-Corona Borealis Great Wall - https://pos.sissa.it/233/078/pdf
Distance to the Hubble Deep Field - https://astronomy.com/magazine/2005/02/hubbles-champion
Observable Universe - https://www.springer.com/gp/book/9780387776378
That's the end, goodbye!