Birkenstock Madrid Big Buckle EVA in Eggshell Size:39 Numeric sizes 0 2 4 Color:Space Numeric sizes 0 2 4 6 8 10 12 14 16 18 20 Alpha sizes XXXS XXS XS S M L XL XL 1X 1X 2X Fixed waist sizes 22 23 24 25 26 27 28 29 30 31 32 33 16X 18X 20X Waist 21 1 2" 23" 24" 25" 26" 27" 28" 29" 30" 31 1 2" 33" 35" 39" 41" 43" Hip 31 1 2" 33" 34" 35" 36" 37" 38" 39" 40" 41 1 2" 43" 45" 47" 49" 51" with a lug pattern and depth optimally designed for light to moderate trails and for easy trail to road transitions it smooths out slight irregularities in the floor and ensures that every step is softly cushioned odor neutral EVA has been tested for harmful substances and combines numerous positive attributes: it is very light