Originally Posted by 32quarters
This type tube is for those who want to expand their glans but restrict the shaft, which is a pretty niche group. If you want to add girth to the entire penis then size the tube to fit the largest part of the penis.
I personally sized the tube according to MSEG/base as described in the sizing thread on this forum, like I would have for a straight cylinder. I went with the mushroom head for a few reasons. One, I don’t mind having extra glans expansion, as my glans is slightly smaller than MSEG/base and would prefer the opposite. Second, I’m also going for a combination of length and girth, so with the size I chose I expect to be packing the base/shaft in a couple months. If true, I would still be getting a pull from the tube for length, and some extra room to keep expanding the glans. Third, I only want one pump (physical storage limitations) for the time being, and didn’t want to get a straight cylinder in a larger size, as I think it would be too big to help with length.
I’m no veteran and do not have the pump yet, so time will tell if this will work out as intended.