These are cute little brioche projects that work up quickly.
The first 2 I did with a 3.5 hook
The third I did with a 3 hook.

I’d go with the 3 you want your work nice and tight and it just looks better and crisper lines!! I am usually a tight crocheted and I still found going to a smaller size was a great advantage.

Thanks Tatsiana another great little project

Works out to an average of 10g of each color for a heart.