10" x 13" is the perfect size for mailing and storing standard or oversized documents flat when folding is undesirable

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This size makes them ideal for enclosing letter sized sheets of paper without any need for folding them and creating messy

these envelopes feature straight gummed flaps

Featherlite 3200D Series 40' Industrial Heavy-Duty Aluminum Extension/Straight Ladder Twinings_of_London_Enveloped_Tea_Bags_50_Pack 10" x 13" is theHeavy duty "C" channel construction. Side rails: 2 1 2" x 1" for straights up to 14'. Side rails: 3" x 1" for straights up to 16' and up. Heavy duty serrated "D" rungs prevent slipping for safe and sure climbing. Black ABS, high impact, non marking end caps. Heavy duty safety shoes.