Square 12.5 x 10.5".  ?a diamond with use of two yarns? Hang either way.
These samplers have an interesting history.  I began to hook trimmings of my spot dyed 'cassoulets' to show rug hookers how they would look hooked. It was hard to tell from puddled or flat photos. I began then to add my hand dyed taffeta and 'silkies' pieces for the same reasons.
Once the linen was full,  I thought, why not fill in with interesting yarn or other fabrics?  The sampler was born! 
I now hang them on my walls of my home and studio and one is currently in a fiber arts show!  The textures are amazing and people cannot help but touch them! 
I often hang them diagonally and they are rarely exactly even on the sides. I hope you will enjoy looking at them and perhaps buying one!  
Am happy to take more pictures or answer questions.