Net size: 7sq" / 45cm2 (630,000px Square)
Use any shape within 7sq" (45cm2), it means that total result after multiplying Width x Height has to be 7sq" (45cm2).
For example, a magnet 3.5" Width by 2" Height has 7sq".
Extra for cutting bleed: 1/8" / 0.4mm
Safe margin for text and inner images: 1/8" / 0.4mm