Depending on what "Square" you are looking for—whether it is the popular payment processing hardware or specific square-shaped materials—here are the best places to buy them in 2026.
If you are looking for physical square objects like steel tubing, wood blocks, or home decor, these sources are highly recommended by users:
: If you need small 4x4 inch wooden squares for crafts, Etsy is the preferred platform to support independent woodshops and find specific dimensions like cm blocks.
: A great option if you need a reader immediately. They typically stock the basic Square Contactless and Chip Reader and the Square Stand in-store.