No, as has been said up above, your tortoises have the start of pyramiding. They need to be set up in a very humid environment in order to stop the pyramiding from continuing.
There is no way to know that from a few pictures. I could make a better guess about the health and "fine-ness", of your tortoises if I knew more about their history. And, no, as we've all stated the shells are not perfect. They have been kept too dry and are on a path toward pyramiding. Read the care sheet at the top of the sulcata page for tips on reducing the pyramiding.
...and how boring! Try to imagine YOU living in a small plastic box like that.
The tortoises need more room to wander around. They need a hiding place. They need a shelter so they can get out of the light and hide. They need a waterer. They need substrate so they can dig down into it.
Please read the important threads that we have here on the forum at the top of the Sulcata section.