Checked and hand luggage, checked against real IATA weight and size standards together - since a bag that's both overweight and oversized gets charged for both, not just one.
The 23kg/32kg/158cm figures shown by default above come from IATA's own widely-used reference →: 23kg (50lb) as the typical advised maximum for checked luggage, 32kg (70lb) as a harder ceiling above which most airlines won't accept the bag at all (a limit tied to baggage-handler lifting safety in many countries, not an arbitrary number), and 158cm (62in) total linear size (length + width + height, including wheels and handles). But these are a common starting point, not a universal rule - business and first class often get a higher allowance than economy, budget carriers frequently set stricter limits with their own fee structure, and the exact numbers can vary by route even on the same airline. The weight and size limit fields above are editable specifically so you can replace the defaults with your own ticket's real numbers once you know them.
Whatever the actual limit turns out to be, weight and size are always checked separately - a bag can be light but oversized, or compact but overweight, and either one alone triggers a fee. Both at once typically means both fees, which is the scenario that catches people most by surprise regardless of which airline's numbers apply.
Carry-on limits vary even more than checked baggage - IATA's own recommendation (55 x 35 x 20cm, 8kg) is used as the default here, but individual airlines range from around 7kg on some Middle Eastern and Asian carriers up past 20kg on others. Switching between "Checked bag" and "Carry-on / cabin" above resets the limit fields to that mode's typical default - always overwrite them with your specific airline's real number before a flight with a full cabin bag.