This category contains window envelopes. Our white window envelopes have a back gummed flap closure and a clear plastic window through which you can view the contents. They also come in different sizes. Sizes #1, #2, or #3 are all very popular for stock stamps or any other items. You may choose from different quantities for each size. With a price ranging from 1,7¢ to 2,5¢ each, we think that they will be greatly appreciated!