This size has been around for a long time and it is the classic weight for shambhala bracelets. > Shambhala Bracelet Kits.
The diameter is listed as 1.2-1.5 mm because this braid flattens into a rounded rectangle with one side 1.2mm wide and the other side 1.5mm wide. If you need a thinner cord that match check the 0.8mm Fine Weight.
Note in Colors - Dye lots vary. Colors with the same names and color code are usually the same, but dye lots sometimes shift noticeably. When a color shifts, a new color number or subnumber is created to differentiate the dye lots available. The US importer is no longer importing this product and will not share his sources.
Want more colors in similar sizes? > New Medium, HDQ, or 1mm Weight