Full, half or forearm — pick the shape before the subject
A full sleeve runs shoulder to wrist and needs a reason to hold together: a shared background, a repeated motif, a single palette. A half sleeve stopping at the elbow is the most forgiving option — it has a natural border, sits under most short sleeves when you want it to, and can be extended later if the arm stays coherent. Forearm-only work is the most visible and the most social; think about whether you want conversation about it daily. Whichever you choose, decide the outer edges early. Sleeves that end mid-bicep with no logic look unfinished in a way that's hard to fix without adding more.
