Southworth Antique Laid Envelopes, 24LB, Size 10, 50 Count, Ivory Rich and distinctive 25 percent cotton fiber, No. 10 envelopes with attractive laid markings can be used with both business and personal stationery. Antique Laid Envelopes are ideal for use with letterheads, reports and resumes where a distinctive look and rich, crisp feel characteristic of all Southworth air-dried cotton fiber papers is important. Watermark. Security/Date-coded. Laser and inkjet guaranteed. 24 lb.