Help Finding out drum tom size!

Hey, so I have a Mapex Saturn Pro. This is a pretty old drumset, and so upon looking for new drum heads for them, I discovered that I have no idea what their tom sizes are! I was looking all over the tom in hopes to see a number, but seeing that I'm still fairly new to drumming, i couldn't find anything. Based on my assumption, I would assume that their sizes would be 10'', 12'', 14'', 16'', and 22''. The problem is that i have no way to confirm it. If you know of any ways to find the tom sizes of a drum without having to measure it, that'd be great! or if you simply know what the size of the drums would be already, that'd be even better! I tried to do some prior research on the drums, but couldn't find any that seemed to very specific to my drums. (they are mounted a little differently than most drums, because they don't have floor toms, i cant remember the name of the mount, but its basically one stand holding two drums. And i'm not sure if the mount difference would change the specific model for the mapex saturn pros back then. also, its a seven piece drum, and I don't even have an assumption for the snare size.) I would post a picture, but am not really sure how to, considering that I'm fairly new to these forums too. Anyways, if you could help me out, thanks!

Help Finding out drum tom size!