TSA 3-1-1 Ready: 3 Pack - All Same Medium Size (7.5 x 5.5 x 2.2 inch). We maximized every inch of space strictly within TSA carry-on regulations. It perfectly holds ~four 3.4oz travel bottles plus small essentials. [NOTE: Fits quart-size TSA bags — not for full-size shampoo bottles; The bag is a soft case] See-Through & Reinforced Seams: Made of flexible transparent PVC plastic (0.3mm thick) to help you (and security staff) spot items instantly; Reinforced seams prevent splitting and reduce leakage (Zipper is not waterproof); If you notice a new-product scent on first opening, simply air the bags for 1-2 days before first use — it will dissipate naturally