From Amazon
HERMA Self Adhesive Address Labels, 21 Labels per A4 Sheet, 10 Sheets, 70 x 42.3 mm, 210 Labels, Blank Mailing Labels Stickers, Sticky Labels for Laser & Inkjet Printer, White
Ecprof
8634 - Labels Premium A4 70x42.3 mm white paper matt 210 pcs.-White-Se