proper sizes for airport [SEP] i like the little pill bottles with very secure screw on lids they are perfect for my needs one for am pillsone for pm pills and one for as needed pills they would be good for any small items like earrings as well the pump sprayer bottles are handy for hair spray i only need one the shampoo and conditioning bottles have a very small openings filling them is difficult i would rather have a larger opening with a screw on cap so filling would be easier and thicker products could also be used they come in really handy zippered clear bag to keep the bottles altogether you can put the whole collection in the front of your carry on so that you can easily remove it during security checksthey are the proper allowed sizes for carry on luggage for security i purchased this at a discounted price in return for an honest review