Each country has a minimum amount that you must spend to qualify for a VAT refund. This amount varies by country, so check before you shop. Be sure to carry your passport with you during your shopping ...
Tourists in Saudi Arabia can get a full refund on the 15% VAT for eligible purchases over SAR 500 (~USD 133). Refunds apply only to goods, not services, and must be made at ZATCA-approved retailers.