How to secretly find out their ring size
New analysis from 77 Diamonds reveals that one in five men get their partner's ring size wrong when asking for their hand in marriage. 77 Diamonds has commissioned a survey of 1,300 married men* and found that when it came to buying an engagement ring, 78% did not know their partner's ring size. When it comes to trying to figure out their partner's ring size, it seems a lot of men opt for a straightforward solution with 35% saying they simply asked their partner outright.