I have 500 coils, which fit well into this box. Meanwhile, I have already gained a second box, because the product description is somewhat confusing. I thought that fit well 27 coils with 500m length. Unfortunately this is not true, although they fit, but you can only equip every other twine holder. Too bad that I can use only half of the box :(
Therefore, I have also to buy a second need, now I can sort by super strong and neutral colors, which also has what :)
The reason why I pull a star for this product is that the lid is not beautiful lies flat when the box is not completely filled. Maybe it's the height of my coil, but then should not you specify that it should be universal.
Nevertheless, I am happy with the product and would buy it again, because it saves space and beautifully creates order in my little Nähecke!