This battery cover I bought because my Nokia Lumia 630 Dual SIM not fitted with shiny blue battery cover in the third Flip Case specifically for this model Lumia. It brought the solution: The dull orange-colored cover obviously has the standard dimensions - in contrast to the brilliant original cover, which is a bit too big and with the Lumia only can not be pushed into the Flip Case or not sure holds it.
I am therefore very pleased that I can now protect your smartphone with a sturdy shell, even if there is not the cover in blue.