If you're a guy, you've 1) measured your penis; 2) wondered "Am I large or small?" and 3) probably worried about whether you're large or small.
Just like the men to which they're attached, penises come in all shapes and sizes (some would even argue personalities, but that's beyond our scope here). Smaller penises really do work as well as larger versions, so quit fretting. A partner is probably much more concerned with how you use what you have. Remember that it's possible to have too much of a good thing--some women, for example, find sex uncomfortable if a male partner has a very large penis.
A regular condom--one not labeled as having a larger or tighter fit--will work for just about any man. Condoms have an amazing ability to stretch, and can usually accommodate even the stoutest guy.
Men aren't always happy with the way a condom fits, though. One study found that while most men are okay with how condoms fit and feel, a significant number reported having an issue with either the length (too long or short) or width (too loose or tight) of condoms. This is a problem because lack of satisfaction with fit is one factor associated with not using condoms.
Good thing that condoms come in a variety of styles and sizes to meet the needs of all those different guys. Try different ones. Experiment. Don't make it too complicated, as a standard variety condom will work fine for most guys. But if you're not thrilled with how the condom you're using feels, try something different. Remember that beyond length and width, condoms have different shapes: some are straight, while other might be flared with extra room at the head, or snug at the base.
Beyond matters of fit, there are seemingly endless varieties of condoms on the market. They come in all types of colors and different textures (ribbed, studded, and so on). Some are incredibly thin. Condoms can be flavored or have a coating that lubricates or (according to their manufacturer) enhance pleasure through creating warming or cooling sensations. Some even glow in the dark (in case your partner loses you, presumably)!
Far from being boring or getting in the way of your pleasure, condoms can make sex better. The bottom line is that "wrapping the package" is smart for many reasons. We sometimes think of condoms primarily as a means of birth control, but remember they can greatly reduce your risk of getting a sexually transmitted infection (STI), of which there are over 19 million new cases in the U.S. each year. Most of these infections don't have symptoms that are easily recognized.
Have fun. Be safer. Choose the right condom for you and make sure you learn the right way to use it.