1. Photograph and label
Take a full-frame photo with cushions on, then another with cushions removed. Give every seat, back and corner piece a simple label that also appears on your measurement notes.
2. Record the usable dimensions
Measure the seat between the frame’s obstructions. For an existing cushion, measure seam to seam without pulling stretched fabric. Note any difference between the cushion and frame dimensions.
3. Treat backs and hinges separately
Record back height and width independently. For a chaise, note seat length, back length and hinge position. For a shaped piece, include a sketch and ask whether a physical template is needed.
4. Confirm before ordering
Photos and preliminary numbers start the conversation; they do not replace approval of final dimensions. Do not cut fabric or discard the old cushion until the specification has been agreed.