I need to know what size to order?

I order XXL, they worked good for me.

What size should I buy? My calf is 20 inches, my shoe size is women’s 9.

My calf size is 18 inches and my shoe size is 10 and I bought a plus size 3XL. They fit around my calves perfectly and don’t cut off the circulation in my leg.

Where is the size chart?

It's the 6th picture in the listing (2nd from last). But it looks like the information there is mixed up. The "calf size" data is where the "height" data is and visa versa.

I'm 6' tall with 18" calves. Which size do i need?? XXL says up to 5'6" and there's no way they'll be long enough - but longer socks will be too wid

I'm not sure how to answer this. I'm 5' tall with 15" calves. I got the XL and they actually go over my knee, granted they don't stay there because there isn't anything on the sock to hold them there. If it were me I would go for the calf size. If they don't fit I think you can send them back and get a different size. I've had to do that because I'm short. I hope this helps.