Originally Posted by
Kacee
The allowance is one carry-on plus a personal item. A daypack that will fit under the seat is a personal item.
For clarity, provided that it is under 80cm (31") in total dimensions. This is actually smaller than Spirit, Ryanair or EasyJet personal item dimensions

,that not that I've ever seen it rigidly enforced on SQ.
* The maximum dimensions for these bags are 40x30x10cm each. If your item exceeds the total dimension of 80cm (the length, width and height combined), it will be counted as part of your standard cabin baggage allowance. You will then be required to check in either your cabin bag or the additional item.