If you are not total noob, then you know that huge butt plug is not something that you start with. At first you start with small one and when you are ready to try something bigger and so on. If you want a proper anal training, then you want to try with something like this anal dilator kit.
This anal dilator kit have all you need for for anal training. This kit contains 5 different size dilator butt plugs. You can start with the small one, that is 3,5″ in length, have 3,25″ circumference of the head and 2,75″ circumference of the shaft and work your way all to the big one, that have 5″ in length, 6,25″ circumference of the head and 5,75″ circumference of the shaft. That is more then enough to prepare you for something bigger.
The biggest one will give you nice gaping feeling, but you might want to try something even bigger. Some of the buyers said that would be nice if there would be one or two even bigger anal dilators in the kit. So this kit is for little less experienced users.
This anal dilators are made out of very hard plastic. Which is not all that bad, but is not very comfortable for long time wearing. Some will like it, so wont. Another cool think is that they all have small hole on the tip to prevent pressure build up.
If you decide it to get it, make sure you use a lot of lube. I like to use water based lubes. The price for this kit is everything from 43$-60$, depending where you wan to buy it. I found the cheapest price over here.