Measure penis girth when fully erect
Use a soft measuring tape or a string and ruler
Wrap the tape around the thickest part of the shaft
Note the circumference in inches or millimeters
Compare your measurement to the condom brand’s size chart
Choose snug fit if girth is smaller than average
Choose regular fit if girth is around average
Choose large or XL if girth is above average
Check the condom package for nominal width
Try a different size if the condom slips off or feels too tight
A proper fit should feel secure without pinching or sliding
Test a new size before relying on it for sex