This 2x magnifier has two viewing areas. The large 2x general use area measure 4 1/4" (11 cm) diameter. The bifocal area is 1" (2.5 cm) diameter with 4x magnification. The support cord has a plastic adjuster magnification. The support cord has a plastic adjuster to allow the user to position the magnifier for the use intended. Ideal for doing cross stitch with large viewing area, and threading the needle with the smaller increased magnification area.