Is 5 inches of girth big?
Yes. A 5-inch (12.7 cm) erect girth is bigger than average and sits around the 83rd percentile, meaning it's thicker than roughly 4 out of 5 men. The average erect girth is 4.59 inches (11.66 cm).
Yes. Five inches of erect girth (12.7 cm) is thick — 83rd percentile, beating four men in five.
The average erect girth is 4.59 in (11.66 cm). Five inches clears that by nearly half an inch, and that gap matters. The number comes from the biggest clinician-measured dataset ever assembled (Veale et al., 2015, BJU International, n=15,521). At the 83rd percentile, a 5-inch circumference lands squarely in thick territory.
One catch before you celebrate. Girth is the distance around the thickest part of the shaft, not the width across it. Wrap a flexible tape around it (or a string laid against a ruler), pull it snug, not strangling. Plenty of guys inflate their number by yanking the tape tight. If 5 inches holds up under an honest measure, you’re genuinely at the top end — and that’s the dimension most women say they notice.
Thickness and length pull on each other too. See girth vs. length.