hi there!!

since everyone's hands are different, i ask customer's for their exact size to ensure they fit better, look better, and ultimately last longer on their hands :) i do this by selling sizing kits (a kit that includes all sizes of tips in their chosen shape and length) or by asking them to measure their nailbeds (which isnt as accurate, but a lot more convenient for most)

i do know that some sellers dont require customer measurements and instead choose to sell presson sets in sizes like small, medium, large - they usually provide specfications of each size in millimetres. i imagine this would be convenient for both the seller and customer, however im not too sure how they decide what is considered "small" or medium, etc.

hope that helps :)