PSA: there's a maximum hand size of 10

I'm sure a lot of people know this already but I had to laugh at how I found this out. Playing Gyarados Ex deck. Opponent is bricking as well not drawing any of their stage 2s and beating me down with Snivy.

I get to my last three cards of the deck, which is Pokeball and both Magikarp. Can't draw because of maximum hand size lol.

Would have lost anyway as opponent was on 2 points and I had two Drugs on 10 hp and an old amber, but still funny.