A note about overseas purchases via USPS...
DON'T use the USPS for any overseas shipping. We're STILL currently experiencing the various problems caused by Trump's Postmaster General's dismantling of the USPS because...well, Fred Durst said it succinctly: "Break Stuff". But our "First Class" these days is more akin to making sure things arrive AT ALL.
Simply put: use UPS, FedEx, DHL, whatever you want, because the USPS will get things there whenever they damn well feel like it now. Not reliable with anything of significant value!