I'm not sure you should make tortillas in a pan intended for omelets. Mexican style tortillas call for a high dry heat that could damage the seasoning on a crepe pan. And the pan is too shallow for a Spanish style tortilla. The crepe pan will work fine for omelets (the quick French kind), and for pancakes - one at a time.
I'm not positive but I think the crepe pan that I prefer for 2 egg omelets is a 22 cm one.