What size masturbator should I get?
Short answer - one that fits. Longer answer - you need to measure your penis. Use a flexible measuring tape to get your true length and girth when erect and get a stroker or masturbator that will accommodate you. If a product is too small it won't work as well, or could split making it a waste of your money.
A few extra things to consider
If you're worried about how long you are, consider an open ended model.
If you're on the girthier side, materials like TPE and liquid silicone have more stretch than pure silicone - and they'll feel great too. There are also models which open lengthwise or wrap around your shaft, making them great for larger men.
Still got questions? We have answers! Find out if you should you get a manual or an automatic stroker, if apps are worth the extra cost, and once you have a masturbator, how you clean it.