Last year, first time ever I drew all my sin named creatures into one scene. In the size of an ACEO card. That is 64 × 89 mm (2.5 x 3.5 inches).
I've made some datailed cards earlier but squeezing seven rather complicated fullbodies into one small card was a challenge. Really time consuming - would do again for sure.

¤ Very thin liners, small brushes, watercolor. 2023. Photos compared to a hand.

(ACEOs are art in the size of standard trading cards. I've been making them as monthly art trades since 2010 through a group in deviantART. This card, however, I kept myself.)