KASE Universal Lens Filter came in nice but bulky case that is so big that cannot fit in pocket or bag I carry with me. I had to make much smaller case so I can bring filter with mi and keep it protected from dust and physical damage.
Case is simple: squared in shape with top and bottom that tight fit so case is kept closed just by friction.
Inner dimensions of box are 60mm x 60 mm x 5 mm. It may have use for other stuff that can fit.