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: Standard , SNR 35, EN352-2:2002