I think the only groups that impose specific standards are the ones that are national, and they have the standards for good reasons based on how the quilts will be presented and used. Most communities have various charitable groups that are thrilled to get any quilt that is attractive and functional. I personally prefer not to pay for shipping my quilts elsewhere when I know there are people in need in my own community, so I donate through my quilt guilds.
As others have said, you can only deduct the price of your materials or the market value of the object, whichever is LESS, and you need to keep receipts. Your time is not deductible. I believe you can also deduct your charitable mileage.