I'm still learning english so if you find any mistakes in my comments, journals or under my artworks feel free to tell me. Correcting mistakes is an important part of learning process.
ATC/ ACEO - An artist trading card (or ATC for short) is a tiny, original piece of art created with the intention of swapping or trading it with another artist, not selling it. An ATC must be 2.5x3.5 inches or 64x89 mm. ThoughtCo.
0/6- nothing.....| 3/6-lineart
1/6- idea..........| 4/6-simple colors
2/6 - sketch......| 5/6-shading, details