Graphics , Where Do I Begin? Thumbnail...what?

Snap a photo of your item or design your own custom graphic, it’s easier than you think.
There are plenty of free tools online to help you get started.

Whatnot thumbnail size is 1080px x 1350px. 

Here are some free design apps. You'll find pre-made temaplates you can edit or pay for a subscription.

If you love Adobe Photoshop or Illustrator and cannot afford it, this is a cheaper alternative. 

These are for web and free with ads.

PhotoPea (Photoshop)   or   VectorPea (Illustrator)

"Kindly avoid using images from other selling platforms,
as they are the intellectual property of their respective owners."