For what is the C series of paper sizes used?
Envelope sizes 🖂 No 10 Envelope ✉ Envelope ENVELOPES Envelope size No. 10 Envelope Envelopes Envelope manufacture ISO 269 ISO 269:1985
envelope no 10 envelope envelopes envelope manufacture 🖂 envelope size iso 269 1985 envelope sizes ✉ iso 269
envelopes
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ENVELOPES