真实物理比例
自动匹配设备屏幕参数，并支持用银行卡短边进行手动校准。
戒指内圈 · 标准透明
用一枚合适的戒指，确认下一枚的尺寸。
把已有戒指放在 iPhone 屏幕上，对齐内缘，即可查看内径、内周长、中国国标及国际圈号。
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Inner ring · Transparent sizing
Use a ring that fits to size the next one.
Place an existing ring on your iPhone, align the guide to its inner edge, and see diameter, circumference, and regional size equivalents.
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Ø 17.3 mm
为什么是 SizeHalo
先显示毫米，再显示圈号。
标准清楚标注
同时提供内径、内周长、中国、美国、欧洲、英国和日本尺寸。
隐私优先
测量、校准和历史记录均保存在本机，不上传到开发者服务器。
测量范围：SizeHalo 首版只测已有的闭口圆形戒指。手指拍照估算仍在开发和验证中，不会提供未经验证的结果。
Why SizeHalo
Millimeters first. Size labels second.
Physical scale
Uses device screen specifications and offers optional calibration against a bank card’s short edge.
Named standards
Shows diameter, circumference, and China, US, EU, UK, and Japan size equivalents.
Private by default
Measurements, calibration, and history remain on your device and are not uploaded to the developer.
Measurement scope: Version 1 measures an existing closed, round ring only. Finger-photo estimation remains in research and will not return unvalidated results.