What is a Carry-on Size?

Most US airlines allow one carry on of 45 liner inches.
Defined as measuring three sides, Height, length, width and the total is less than 45' to qualify as a carry-on. A full size carry-on is still big enough to bump folks going down the isle of an airplane.
Consider a pilots case. Defined as 35 liner inches. Still roomy for many things but much more manageable.
The caption is offered by Rimowa and a duffel style.

Carry Less, Enjoy More

Can you use just a half ounce of favorite products in your travels?
Consider collecting half ounce containers and try.
Lighter is more fun.

Relaxing Travel with Reading

Relaxing with good book expands the Joy of Travel.
Electronic books save space and are light weight.
Collecting and saving small, thin books for travel can cut down the bulk of a large book.
Books and magazines can be donated along the way to allow space for return treasures.