I really love paper, and I use these three types for various things. The A3 kraft paper is 108kg and comes in a pack of 500 sheets. It's not the thin, light-colored kraft paper you might find at a typical 100-yen shop; instead, it's a sturdy, thick, and properly brown kraft paper. Because it's A3 size, it's easy to use for many things, like making envelopes, die-cutting with a machine, and using as a base for sharing files, which is very convenient because of the large area it covers. The thickness also makes it durable. The pure white roll paper is A4 size, 43kg thick, and comes in a pack of 1500 sheets. This thickness allows for printing with a home printer (though it may depend on the model), and I enjoy printing design paper on it. It can't be too thin to print on, so I personally think 43kg is a good starting point. However, it's also cute to use as is, like glassine paper, so I think you can use it for making sharing files, flat bags, and more. The high-quality paper is 110kg thick and comes in a pack of 500 sheets. The kraft paper wrapping it during storage has partially torn (it's difficult to see, but it's at the top of the fourth photo). The 110kg thickness is slightly thicker than the 90kg range often used for design paper, but not too thick, and it has a high-quality feel. I also enjoy printing design paper on this. I purchased these in bulk from a paper mill, so it's a one-set-only offer, but I hope paper lovers will give it a try.