Stock your office or home work desk with these 4-Count Clasp Closure Manila Envelopes from up&upâ¢. The envelopes have a 9-inch x 12-inch inner space for enclosing standard-sized and slightly larger sheets of paper without bending or folding, and the clasp closure keeps the contents secure. Whether you need to mail a large document or just keep the pages of your annual report together in your desk, these clasp closure manila envelopes make staying organized easier.