Ratio of sales of print sizes?

[yalborap]

This is more of a personal curiosity than much of an advice thing, but it's eating at me.

What kind of ratios do those of you who sell prints get in terms of what sells more than the other? For everyone's sanity, we'll break it up into groups:

Ultra-small(wallet-sized, trading card/ATC/ACEO/etc. sized, etc.)
4x6
5x7
8x10
Medium-large(whateverx12 to about 19 or 20 on the long edge)
Large(21 to about 30 on the long edge)
Super-large(over 30 inches on the long edge)

I'm suspecting that 4x6 and 8x10 will rule the day, but it'll still be interesting. If any of you pay attention to it demographically, that would be quite fascinating to see as well(are younger enthusiasts buying the cheaper, small artistic prints to go on their wall, or are the parents getting pictures of their kids the ones who buy up all the wallet-sized?).

Thanks in advance for any info you can provide.

[OsmosisStudios]

Most of mine are in the Large to Super-large category, actually. I bill myself as an art photographer, so most people want larger images and are ready to pay through the nose for them