5 normally so in crocs I typically get a 7 and they seem to work out. Make sure of the shelf size by looking at the pictures from others so you know how your shelf will fit and whether you want them to sit on the pipe only or extend to the mounting flange and end knob. Update:I was able to use the Razer Synapse software to change the "LOD" or Level of Distance to my mousepade under "Mouse > Calibration" to fix the issue introduced by the skates. I dont use it for gaming but I still gave it 5 stars so as not to lower the overall rating. Dad loved his gift. Then they kind of pull when you turn your head. Hier war ich echt erstaunt. The writing style is lively, clear and at times humorous. Excellent socks. Assez exigeant sur la qualité du son, jai été agréablement surpris par ce casque.