将标准银行卡、硬币或直尺对齐下方边框，建立精确的 1:1 实物比例。
任何标准银行卡、身份证或驾照（宽度 85.60 mm）。
Standard Card (85.60 mm)
Place card against screen to verify scale
将戒指平放在屏幕圆圈上，调节滑块使圆圈完全契合戒指的【内圈边缘】。
Placing a physical ring flat on your screen is faster, easier, and most accurate on a smartphone.
Point your phone camera to scan • 100% Free
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