Heart Shaped Box

Fell in love with this box when I first saw it in a forum and was surprise that this box (base & cover) only uses 1 piece of A4 size paper! I make the big one with A4 size paper and then started to make another box with half of A4 size paper and so on. The brown color is the smallest I can go at the moment. Wonder if I can make 1 that is even smaller than the brown one? LOLx, I'll try~