As a carry-on or as a checked bag?

If it measures 29 inches in the longest dimension, it will not be allowed as a carry-on. The maximum is usually 21 or 22 inches.

For a carry-on bag outside North America, you would also have to consider weight limits. Many airlines limit the carry-on weight to 7 or 8 kg and it would be very, very easy to fill a 29-inch bag to be heavier than that.

Easily allowed as a checked bag.