We all know that different sizes and weights trigger different costs with different carriers - and that is before you consider shipping to another country.
Traditional marketplaces often ask you to set postage on an individual item / destination basis, using information you may or may not know.
Rummij uses AI to estimate the dimension and weight, then consults the internet for the best delivery company based on price and destination.
The amazing thing about AI postage is bundles. Rummij can figure out the overall dimensions and weight, meaning you no longer have to guestimate your bundle prices.