Overade Plixi Foldable Bicycle Helmet Folds down to one third of its original size ABS hard-shell faceplate with special foam for high protection level Includes 3 pad sets and a new fit band to adjust to your exact head size, providing comfort and protection 14 Big holes for air circulation Folded size is only 20.5x16. 5x11.5 cm(8x6. 5x4. 5 in)