Thai Airways Carry-On Rules & Bag Size Guide
Thai Airways: Cabin size, personal item and class limits.
Cabin allowance
One main bag up to 7 kg is the ordinary allowance in every listed class. The table publishes 56× 45× 25 cm including wheels and handles, but the same page also says 115 cm total. These conflict: the full box totals 126 cm. The checker conservatively requires both; confirm larger totals with THAI. Business/First alone does not grant two 10 kg bags. The additional-piece exception requires Star Alliance Gold, First/Silk and a journey involving two or more Star Alliance carriers; confirm eligibility.
A listed personal item is additional, up to 1.5 kg and 37.5× 25× 12.5 cm OR 75 cm total. The checker uses the box; confirm other shapes. This is not a shared 7 kg rule. A qualifying small bag does not reserve cabin storage.
Before departure
Measure the packed bag and weigh all items before leaving. Check the operating carrier for codeshares and every connecting flight. Cabin space is not guaranteed even for compliant bags. Resolve excess at check-in and request the price for your actual itinerary; no universal gate fee or free exception is promised. Confirm infant tickets, child equipment and liquid screening separately. The calculator does not identify aircraft, total several bags or confirm a special arrangement.
Check this bag · Airline baggage page
Official sources
Sources and scope
Source-based research; no hands-on test or specialist review claimed.
Reviewed cabin allowance and its aircraft or class exceptions.
Cabin size, personal item and class limits
Cabin allowanceSource review: · Codex (AI source review)
Check if your bag fits
Compare your carry-on dimensions with your airline’s allowance.