Most of the time the size of the seal is stamped right on the seal.

Looking for parts
 

has anyone found a reliable website to look up parts for their egl a15? I'm looking for a new clutch and brake handle to replace my bent ones. this is posing to be more difficult than I thought it would be.

No idea on the site, but if they're just bent, you can heat them up with a propane torch and bend them back as needed. Just do it slowly and work around the bend.

Unfortunately they are snapped. I just bought the bike from some kid and it needs a new plastic aswell.

I'd compare to the big 4 MX models. Maybe KTM.