Available in TWO sizes the Contours are a cost effective alternative to moulded earplugs, 99% of people should find a fit. , The size and shape of ear canals can vary dramatically from person to person, for this reason the Contours are available in two sizes. , The slim waist of the new earplug reduces unpleasant pressure in the first bend of the ear canal. Extremely comfortable to wear. Size: Small, SNR 35, EN352-2:2002