8 inch embroidery hoop | 20 cm embroidery hoop | by Studio Koekoek
20.8 Inches to CM - Howmanypedia.com
3 Pack Two-Color Scale (inch, cm)Plastic Ruler Set Straight Ruler Plastic Measuring Tool for Student School Office (6 inch Ruler,8 inch Ruler, 12 inch ruler/15,20,30cm) - - Amazon.com