Blue felt (near lowell general maincampus)

In search of any kind of blue felt, any shade of blue would be fine as long as its clean lol. Hoping for a piece that's at least 11x16 if possible in case I make a mistake. Using it to back a cross stitch piece that's a gift for a coworker's wedding, but I don't want to have to buy a whole pack of fabric I won't really end up using. Thanks!