Supply List for Thumbnails sketches are here and also in the Thumbnail section.

Art Supplies continually change so my suggestion is to find markers that you like or already have and use them. I am using Prisma Color in this video, but they have since been discontinued. There are several brand out there on the market.

*Please note that all links are affiliate links*

I suggest the Blick Studio Marker or Copic sketching markers. You can get them listed below.

Blick Studio: https://lindaglovergooch.com/blickmarkers

Single Black Marker: https://lindaglovergooch.com/blkmarker

Copic Markers: https://lindaglovergooch.com/copic

Single Copic Black: https://lindaglovergooch.com/copicblack