Our fables frames externally measure 315mm x 395mm and the opening in the frame is 195mm x 275mm. The frame will fi any A4 piece of art and we think it is best used stand alone. But if you would like to frame a smaller item, you can add a mount board to it.
The frames are not glazed as I believe this is the best way to present embroidery to appreciate all the detail and textures: none of the frames in my home are glazed. The embroidery will be perfectly safe like this. However if you do want to add glazing, the back board allows ~8mm so there is plenty of space in the frame to add glazing.
You will be able to get glass cut to size at any framers and I would highly recommend going with the museum quality glass if choosing to do this. It is worth the extra cost!
Note: a mount and mounting kit are not included with the raw frame.