A print-ready sheet of 27 keys, sized in real millimetres for your keyboard. Pick a style and a corner, print the test page first, then cut and stick.
Print this page first. Measure the key below with a ruler (it should be exactly 13mm square) and check the line below against a real ruler before cutting the full sheet.
Print the test page first, at 100% scale (not “fit to page”). Measure the sample key and the 10cm ruler against a real ruler; if either is off, your printer or PDF viewer is rescaling the page and the full sheet will be too.
Cut along the dashed lines. A craft knife and a metal ruler give a straighter edge than scissors at this size, especially for the smaller MacBook and iPad key sizes.
The stickers cover only the printed letter, not the surrounding key body: the key’s original symbol stays visible underneath unless you chose the opaque black style.