Before you print
How big should it be?
Rule of thumb: printed width ≥ scanning distance ÷ 10. Pick the surface above and the studio sizes the code for you, then checks the printed module size against what a press can actually hold.
Questions people actually ask
Your PayPal.Me handle — the part after paypal.me/ in your link. If you have not created one yet, visit paypal.me while signed in to PayPal and claim it in a minute.
Yes — add an amount and the payment page opens with it filled in. Leave it empty and the sender chooses, which suits tip jars and donations.
Your PayPal account's primary currency. The sender sees the exact currency on the PayPal page before confirming, so there are no surprises.
No — the code is just a link to your PayPal.Me page, generated in your browser. Payments happen entirely on PayPal, and the code is free forever with no signup.
Want the detail? How paypal QR codes work — the payload format, what scanners do with it, and where it breaks.