I use SoftPaws XL clear/natural nail caps....but you can use any brand, or generic, as long as you can make them fit.
Here I'm using a cutting mat and a basic #11 X-acto blade.
Mishka is pretty average sized for a male Corgi (29lbs 14oz) and I trim his nails every week, so I have to trim the nail caps to make them easy to apply and remove (otherwise they'd go right up to the base of the nail and glue would get everywhere).