Yes, finding 11 wides is a problem for me, I'll sometimes go to a size 12 medium, but then I have to put those sticky heel grips in the backs of them, so they won't slip off. That happened to me once, and almost broke my neck & ankle.
Have yet to see a euro size that fit correctly. Bought Versace's at a second hand store once, euro 41's, too tight. Bought Lumiani's at zappo's in euro 42, too loose, fit like 12's but loose.
40+ pairs of shoes in my collection now, all 3 to 5 inch heels. I buy from Electrique Boutique
Sexy Valentines Lingerie, Hot Mardis Gras, Spring Break Swimwear, and Sexy Pleaser Boots at ElectriqueBoutique.com MetroStyle.com, and eBay.com.
Many shoe brands have different sizing standards I guess.
One thing I've found out, if the shoe fits, charge it!