Huili Women's Mid-Calf Waterproof Rubber Boots, Fleece-Lined for Warmth, Rain Boots, Overshoes, Model 6523, Black, Size 40

1. All measurements are in millimeters.

2. Measure foot length by placing foot on white paper and marking the front and back points.

3. In case of slight differences between left and right foot, use the larger foot's measurements.

4. Recommended size should align with usual shoe size. Significant deviations indicate incorrect measurement method.