These frames are metric measures! It is important to note that imperial measures are approximates, and printing in metric is less common than imperial, so you may have to crop the prints with a knife/scissors.
The quality of the frame is very poor, the MDF is thin, and the 'glass' is actually a plastic styrene, not glass at all. The clips are a poor fit to the frame, so damage the MDF or simply don't fit back on. Several frames had to go in the bin.
As a photographer, I was looking for a cheap solution to framing some of my favourite pictures around my home; save your money and spend a little more on a better quality product.