Begin with an ordinary action
Sit down, reach for a high shelf and walk several steps. A jacket can look calm when you stand still yet pull across the upper back as soon as your arms move forward. Record where that happens. The location of a restriction gives a clearer starting point than deciding that the whole piece is too small.
Read the whole shape
Look at shoulder position, sleeve length and where the hem falls together. Changing one measurement can shift the balance of the others. An intentionally dropped shoulder is not automatically a fitting mistake, but the sleeve should still allow the movement the garment is intended for. Compare the shape with the product's fit description.
Use specific words
Instead of writing “too loose”, note whether the extra room is at the waist, upper arm or lower back. Mention the layer worn underneath. A shirt tried over a thin vest cannot tell you how a winter jacket will feel over knitwear. Small contextual details make a second fitting much more informative.
Keep personal preference visible
A preferred fit is not a universal standard. One person likes a cuff at the wrist; another folds it back. Separate a functional problem from a styling choice so both can be discussed honestly. The notebook should help someone choose, rather than tell them how their body ought to look.
