Get the largest crate you can fit into the space you have for it.
Think about it this way, if you are going to be stuck in a crate for hours, do you want food, water, toys, blankets, room to pace and stretch, or just enough room to lay down? During puppyhood you can use the divider tell the pup understands, then you can get the pup the whole crate.
At the least, get the measurements of the largest parent, then get a crate that would be roomy for this dog.
Think about it this way, if you are going to be stuck in a crate for hours, do you want food, water, toys, blankets, room to pace and stretch, or just enough room to lay down? During puppyhood you can use the divider tell the pup understands, then you can get the pup the whole crate.
At the least, get the measurements of the largest parent, then get a crate that would be roomy for this dog.