[Simi]

Chastity can be fun to play with, eventually you will find one which fits you properly, I will point my pup towards this thread and see if he has any advice on sizing. what size are you when entirely flaccid as that is the required minimum size (then obviously depending on how strict the device needs to be you can go for a little bigger so its in the gap between both)
birdlocked style devices are ones i've had success with as the devices are softer they have a little bit more give and in some case can be more comfortable, metal bar ones can be more practical for longer term use (aka my puppy :P) even on him i currently have to left him out occassionally