I’ve found that it really, really depends on how well the space is used. I lived in an apartment that was about 650sq ft with me, a chihuahua, and sometimes a retriever if I had a foster, but the layout was terrible and there was no storage, so it felt super cramped. Then my ex and I had a 700-ish sq ft place with 2 small dogs and it never felt claustrophobic. I’ve also toured tiny homes in the <350sq ft range that I’d pick over some apartments twice that size. The houses might be ok if they aren’t just “take a regular floorplan and shrink all the rooms.”
There’s a vegan sushi/ramen place near me that makes something between musubi and onigiri with vegan spam and they’re crazy good. So that’s one use for it.