Quick answer

Measure the finished card width and height first. Then record the holder’s internal pocket, visible window, slot position, orientation and thickness. Do not use only a general name such as “standard badge holder.”

Measurement record

ItemWidthHeightNotes
Finished card / insertmm or inches
Holder internal pocketUsable space
Visible windowArea not covered by seams or border
Holder outside sizeUseful for packing

Orientation and attachment

Final approval checks