Fan covers are completely washable, you simply take them off put them in the wash and pop them back on.
All fan covers are standard fan cover size 50cm x 13cm and come in a pack of 3.
I do however custom make and can make packs of 4. If you require a pack of 4 it will incur a $9 fee and if you require custom made if they are 50cm and under it will be $35 otherwise 60cm will be $45 but please don't hesitate to contact me.
If there is a design or style you are looking for that is not available please contact me as I do special order in and do not incur any charges happy to find what you want.