i know this might be an odd question, but im working on the setting for an engagement ring and i need to get her ring size..the only problem is i have no way of knowing it. she doesnt have any type of ring jewelry to compare sizes..i could ask a friend of hers for information, but i wanted to use that option as a last resort to keep it secret..but if i have to i will..my question, does anyone know of a way that i can ''secretly'' measure or figure out her size without it being obvious? if it helps shes about 5 ''4, 110-115 pounds, slim and petite..thanks for any advice/tips..the jeweler mentioned a 4.5 or 5 size..