How to measure, how to photograph, and how the house reads a body. Ten minutes here saves a fitting later.
Work in front of a mirror, over a shirt, with the tape snug but never pulled. Record chest, waist, hip, shoulder, sleeve, nape-to-hem and height.
Four frames — front, back, both profiles — full body, flat light, plain wall, phone at chest height. The fit read uses silhouette, so avoid bulky layers.
Ease is the air between the body and the cloth. A commanding overcoat wants more through the chest and less through the waist; a clean city cut wants the reverse. Your chosen fit style sets the starting ease and you adjust from there in the configurator.