Chuck on the left is the bigger one just under 7in and Bruce is a little smaller 6in exact. And is the black markings normal I bought these guys off kijiji same as cregs list in the states.
Left one is hard to tell, the right one is definitely a female.
Can you post another photo of the tort on the left, an upside down photo of the tortoise would help us identify its gender. About the black markings, they're perfectly normal.