We make the bags in your preffered size, here is a table of some common sizes we make for the scandinavian opticians:

Item no	Width cm	Gusset cm	Height cm
7960	19	11	24
7961	20	9	26
7962	21	10	29
7963	18	8	18
7964	21	9	21
7965	24,5	10	20
7966	26	13,5	20
7967	23	10	23
7968	26	10	20