I am not diabetic, but I have knee socks sought which are without condoms. The quality is good. Because I'm happy. The color is dark blue, would have preferred black, but that's not a shortcoming. The size is 39-42. My size is 40. The foot of the sock is slightly larger, but that's not so bad. Only if I pull up the socks right, then go half over his knee. My calves are 41 cm and the length of the stockings is just about ok. Actually I wanted to send them back, but they have to keep. Wear them stop only underpants. Since you can not see that they are turned inside out. NS Here adaptable sizes would be asked. 39-40, or 38-39, 40-42