Measured exactly as instructed but when it arrived it was far too big around the thumb area and moved around. I contacted them for help as I was slightly annoyed that it didn't fit properly, got nowhere and had to spend a further $10 to return. Unhelpful customer service response. I'm an intelligent person and measured a number of times to ensure that I purchased the correct size, yet it didn't fit! I don't have strange shaped thumbs, they're completely normal. I would not recommend. Search around for a company that will help when the need arises

I thought I have the right measurements

These are causing my thumbs joints to ache/hurt, no matter how loose I fasten them. I’m assuming that this is just some sort of normal, break in period? I hope so, and I’m wearing them regularly to give it my best shot. The measurements do seem perfect, however.