HeysMarvel Comics 26 Inches, Multi Color, One Size, multi color, One Size, Marvel Comics 26 Inches

Is this carry on luggage?

Is it 21" or 26?. In the discription says "this 21 spinner ", and in the title says "26"

Is it 21" or 26?. In the discription says "this 21? Do you still have the two piece I can’t find it spinner ", and in the title says "26"

Is this a good luggage for a seven year old boy?