TeeHee SocksFlip Flop Big Toe Socks Adults Patriotic American Flag Christmas Santa Solid Black Grey Stripes 3 Pairs

Size of item is mentioned 'large' but item description mentions 10-13 mens (us shoe sizes 6-9) avlable. which one is large and why i see no options?

Will "one size fits many" work for mens size 10?

Are these a set of 3 pairs?

Do these fit a size 6 snug? I only ask because they are not offered in smaller size, hoping they might work for my 5.5 feet?