Sorry if this has been addressed previously, I tried the search function, but you all know how that goes.
I'm trying to buy/trade period correct toe clips from a BF member to go with my shimano 600 pedals.
The size is "LL", and I'm not sure what shoe size this corresponds to. I'm going to measure my current
cheap plastic standard toe clips for a comparison, but i figured I'd check with you guys too. My shoe size is 10-10.5 (US). Thanks!

LL is the extra-large or largest size. These cleats came M, L & LL. Selecting the clip solely based on shoe size is not necessarily helpful, as the clip size can vary depending on wheter it is a cycling shoe or not and in the case of the former, your preferred cleat and strap position. Fortunately, the Shimano system allows for about 3/8" fore/aft adjustment which helps quite a lot. FWIW, I wear typically wear a 10.5 cycling shoe and have the L clips on one bicycle and find them marginal even at there most forward position.