T-Shirt
Side Seam
Name the side seam, then ask for the change you want: wider or more fitted ease, a contoured waist, or an A-line hem. Say whether the amount is the total across the body or only one half. The same request works in pattern terms or relative to underarm, waist, and hip landmarks on the avatar.
Examples
How to prompt
Say side seam or sides, then the change: wider or more fitted, contoured at the waist, or A-line (hem wider than the underarm). Say whether your amount is the total across the body, or only one half (one side). Phrases like at each side / per side mean one half; the full width then changes by twice that. Landmarks such as underarm, waist, and hip are the shared names when you think in 3D. See Body Landmarks for the full map.