Name badge
Even before everyone was wearing masks, many people meet MANY people at an event and/or are face blind. If you want to be recognized or remembered consider that most people who know you online will recognize your avatar or handle. make that something you can wear if you wish to be recognized. And make sure your online name/handle is available for people to read (especially if spelled 1337) in a lound environment so they can find you again later.
Name badge - (name, twitter handle, pronouns, twitter avatar)
Embroidered Patch with handle
Pin with avatar
Shirt or patch with avatar
Consider making your avatar your face
Recently I have seen masks with handles/names
Be unique! just remember people may want/need to take a photo of it to remember or read, and bigger is better in a lot of cases.
I have specifically purchased from (to date)
http://namebadgesinternational.com like mine (name, twitter handle, twitter avatar)
I recommend Prestige Plastic Badges or Regal Large Badges
I am looking to swap to
Pine Trees and Rainbows