A4 Letter Folding Guide - Two Ridges at 99 mm for DL Envelopes

Fold twenty letters by eye and twenty of them come out crooked. This rule is as wide as a sheet of A4 and carries two raised ridges exactly 99 mm apart -- one third of the 297 mm length. Lay the sheet across it, fold the paper up over the first ridge, then down over the second, and it goes into a DL envelope without a fight. Marks every 10 mm along the edge double as a rule, and the hole keeps it with the envelopes. SPECS - Size: 216.0x56.0x7.0 mm - Estimated filament: 21.9 g (~2.2 h print) - P…

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