Gray 40cm Tall Mou Boots

I bought these brand new over seas and have wore them a couple times. I have never found a Mou boot that has a size or material tag yet and because of that, I have bought boots listed as a US 7 that had a EU 38 sticker on it and also some listed as a US 8 but bottom sole measured 9 3/4 inch which is really a EU 37 (US 7) So I started asking for bottom sole measurements and 10 inches is a EU 38, US 8 and 10 1/4 inches is a EU 39 US 9. That has been working for me, anyway. These were shipped to me in double insulated envelopes with little round 38 stickers on the back bottom sole facing. They do fit me perfect but I decided I wanted these in 50cm tall instead of 40cm tall. That little extra height makes a big difference in zero and single digit temperatures. So I just received my 50s and can now, sell these 40s. I wish I could keep both but they cost too much. I paid 370+ for these and only wore them once or twice so please do not send low offers. On Mou or Farfetch these will be 400.