OBIONO Shoe Sizes are CN Sizes. Please refer to shoe length before choosing size.

Measurements may vary based on size and individual height
Shoe Measurement Guide：

Here's everything you need to know about proper measurements.
Step 1: Find a pair of shoes you like, then find the size icon under the product title or the size listed on the website's footer menu size page. (Note: Measurements may vary slightly based on shoe size.)

Step 2: Prepare a blank sheet of paper, then use a flexible measuring tape to measure the sole of your own foot (from longest toe to heel) and compare the numbers to determine the most comfortable fit. (Tip: Use our handy guide below.)

Step 3: Please repeat the measurement several times to find your final most comfortable shoe size. (You can never have too many shoes.)

Foot Length (cm)	21.49-22.00	22.01-22.50	22.51-23.00	23.01-23.50	23.51-24.00	24.01-24.50	24.51-25.00	25.01-25.50	25.51-26.00	26.01-26.50	26.51-27.00	27.01-27.50
Foot Length (Inch)	8.46"-8.66"	8.67"-8.86"	8.87"-9.05"	9.06"-9.25"	9.26"-9.45"	9.46"-9.65"	9.66"-9.84"	9.85"-10.04"	10.05"-10.24"	10.25"-10.43"	10.44"-10.63"	10.64"-10.83"
CN	34	35	36	37	38	39	40	41	42	43	44	45
US	4.5	5	5.5	6-6.5	7	7.5-8	8.5	9-9.5	10	10.5	11	11.5-12