I put in three items: a large kotatsu quilt (210 x 270 cm), a quilt and a quilt cover (both D size 190 x 210 cm). It was quite bulky without being compressed, but the size was perfect for L. The size is a little thicker than the largest carry-on case. I wanted to make it as small as possible, so I got on top of it and put my weight on it, while releasing the air and tightening the belt. The belt is adjusted using a metal ring, but because the fabric is slippery, it can be adjusted just by pulling, so it's very easy. There's no need to pull the belt from the metal ring with your fingers to loosen it, so it's stress-free. However, it takes up a lot of space, so if you don't have anywhere to store it, it's probably better to compress it into a bag, but this one is easy to just throw in.