Chastity and orgasm denial discussion

First off, I’m a newcomer here, so please forgive me if this is in the wrong category.

That said, I keep running into an issue whenever I wear a chastity cage. My cock keeps slipping out. When I say ‘grower,’ I mean it completely—when I go very soft, my dick almost retracts entirely back inside me. Does anyone have suggestions for which type of cage would suit me? If money were no object, I’d buy every one just to test them, but since that’s not the case, I want to avoid wasting more cash on a device that won’t work.