In 2026, RyanAir is exceptionally strict about carry-on sizes but rarely checks the weight of the "small personal bag" that fits under the seat. However, if you have paid for Priority & 2 Cabin Bags, your 10kg wheelie bag is frequently subject to weight checks at the gate or check-in desk. Staff are trained to spot "struggling" passengers; if your bag looks heavy or exceeds the 55x40x20cm dimensions, it will be placed in a sizer and weighed. If it exceeds 10kg, you will be charged a "Gate Bag" fee, which in 2026 can be as high as €70 (£60). For the free 40x30x20cm bag, the rule is "if it fits, it sits," but for the 10kg overhead bag, the 10kg limit is a hard ceiling that the airline uses as a primary revenue generator.