Once you have the condom in place, unroll it so it covers the full shaft of the penis.

Doing this will help reduce the risk of transmission of any STIs that are transferred from skin to skin contact, such as syphilis. It also makes the condom less likely to slip than if it's only rolled down part of the way.

Condoms should feel snug, but not uncomfortably tight. However, some people find the condom is too long, too short, too tight, or too loose.

Find a condom size that fits. If the condom is too loose, find one that has slightly smaller width for a closer fit. If it is too tight, look for a slightly larger size. Problems with how the condom fits or feels can result in condom breakage, loss of erection, and slippage during withdrawal or sex.

It's important to find the right size of condom for you or your partner. That makes it more comfortable and more effective, as it's less likely to slide off. Typically, it takes trying a few different sizes to determine what you need.