So, what's the magic number when it comes to carry-on sizes? The Transportation Security Administration (TSA) says it's all about the 3.4 oz or less rule, which is equivalent to about 100 milliliters. To put it into perspective, that's roughly the size of a small perfume bottle or a travel-sized toothpaste.
Now, you might be thinking, "But I need my full-size shampoo and conditioner!" Fear not, friends, because there are plenty of travel-sized options available that'll keep your locks looking lovely without breaking the 3.4 oz rule. And if all else fails, you can always check your bag and bring the big guns.
Another thing to keep in mind is that some items, like medications and breast milk, are exempt from the 3.4 oz rule. So, if you're traveling with essential items, be sure to let the TSA agents know, and they'll work with you to get them through security.
The Travel Guide for TSA Approved Quart Size Bag Dimensions