Calligraphy Bag Case for Lessons and Practice KG700-1 Black Simple

Purchased in April 2024.
I injured my back shortly after and found it difficult to carry weight on one side, so I've only used it a few times.
There might be some ink stains, but they are not noticeable as the bag is black.

According to the product page on the website where I purchased it, the dimensions are W380 x H265 x D130mm
Weight: 130g

The shoulder strap length is adjustable.
Includes an inner name tag.
There are three compartments: large, medium, and small.

For reference, I've included photos with a 400ml ink bottle and a B4 clear file inside (these are not included).
A B4 clear file is the perfect size for half-sized calligraphy paper. While it fits in the bag, it might catch and prevent the zipper from closing if you try to insert it straight.

The design is suitable for adults to use. However, even with the shoulder strap extended to its maximum length, I personally found it a bit tight, so children or smaller individuals might find it more comfortable.

It seems usable for other extracurricular activities besides calligraphy.