Couple of questions

OK I have a couple of questions, When I first bought my Leo the lady I bought him from only had mini mealworms and they are very small and I went to a different Pet store and they had what they called Standard mealworms and were way bigger and they had some pupae in all the 60g mealworm tubs. Sorry i rambled on but my questions is whats the deifference between mini mealworms and standard mealworms? I know they have Giant mealworms too. I also bought a tub of waxworms and I know you can feed them to a leo on a regular basis cause they are high in fat but how do I keep them?

I think mini, standard, and giant are all the same thing, just different sizes. A quick google search and I read that giant mealworms are given a hormone that stops them from pupating on time and so they continue to eat and grow (making them giants).