Hey, so in terms of the laptop it doesn't specifically say, what it does say is that when fully packed it has the dimensions : “55 x 30 x 30 cm fully stuffed” The 13inch laptop's width is 24and a half centimetres so you should be able to fit one of them in there. With regards to putting gear in your cabin bag, its fine, it just may get checked a bit more thoroughly when put through security, hope that helps :) Davie