another one (as like the skis) that make me think "two pair."
I do like the colours and that leaf there.

Great idea. Seems a little dark, especially around the sandals. Visually, it doesn't really scream four just because of the color difference and size but I don't think that should affect the relevance too much. For some reason, I love he leaf there at the top. I'm also curious about the background. Looks like old carpet or colored concrete?

good idea, but I would rather see four matching shoes, especially the pink/purple shoes w/ socks. I do not like the background. Is it a rug? Better to shoot on sand or somewhere outside. Again, good idea for relevance.

The darks in this are much too dark, meaning there's too little detail visible in the shadowed parts of the black shoes. The vignette seems a little overdone, too.

Well I suppose two and two is four, but Im not sure why you took this shot

Nice idea. I don't understand the need for all the processing, i.e. the vignette, the contrast. I need to see more detail in the sandals.

i like the moody style of the photo, and it really helps the trainers to stand out! but the sandals arnt needed!!! as it is, they just get in the way, as they are too dark!

retake with just the trainers, and you are onto a winner!