SamsoniteSolyte DLX Softside Expandable Luggage with Spinner Wheels

Q: Does the height of suitcase include the wheels?

I just measured mine. The height with wheels, but not the top handle is about 21 1/2". The top handle sticks up another 3/4" - so it's pretty close to specs depending on your airline. I'm wondering about KLM myself. For that airline it would be good if they don't include the top handle.

Q: Has anyone taken this on american airlines internationally? they are saying the exact dimensions of the bag must be 22 x 14 x 9. bag is 9.5 not 9.

I had no issues traveling to Europe with this bag.

Q: can the 20" piggyback on the 25"?

There’s an elastic strap on the back of the 20” bag. That strap slides over the handle of the larger bag and lays sideways on top of the larger bag. There’s a photo of how it works, along with several other shots of the 20” up at the top of the page.