I bought my lavers over half a year ago, and I'm looking to get some wonderful Quantums soon. However, I have a wee problem, and that is I can't remember the size of my lavers

I know they are in the neighborhood of 10.5 -> 11.0 US, is there any way that I can find out which size of quantums I should buy without the reference "If your lavers are 10, look to get 9 or 9.5 quantums" ?... I noticed that Leather lavers (the ones I have) have a more pointed toe than Mesh, so if that plays a difference in sizing it'd be nice to know too....
If you can just measure the sole, well, here we go.
The only problem with that is you can't see that the edges of the shoes curve, and you can always position the ruler differently.
Thanks! (and I'm useless with the search.. This has probably been asked a few times, if it has can someone for the love of god explain "using the word AND in your search to identify exact terms"...)