Basically, I would go with any of the "Fleshlight girls". They are more expensive, but when you pay more, you are usually getting higher quality. My fiance and I learned this especially with mens toys.
What's most important is to judge with your eyes. Guys and girls alike can look at an object and tell if it's going to "feel good" inside them or in a man's case, with their dick inside of it. Judge the openings of the fleshlights... Do you want her tight or with a little room to jerk around? If you're more fond of tighter holes, which many men are, get a tighter looking fleshlight. Also look at the length. If your peter is a little longer than most (longer than 5 inches) look for an XL size. Be careful that the XL is not for thick dicks, but long dicks.
Now, for the chubby chuck's... go for somewhat of a wider hole. Some men's toys arent' as stretchy as they look, and a small opening can make for a sore dick the next day.
So use your eyes, and your dick to tell you what to buy. If it's a gift for another man, ask him what he would prefer if he was buying a sex toy. If you don't want to give it away, ask him if he would prefer anal or vaginal sex if he could choose one. This can help you choose how tight the hole should be. Judging that you know his dick length and diameter, you can decide if an XL size is needed.
and lmao @ Mitten!