This is a Mima Ito model wear. Although there was no O size option in the size selection, it is listed as M, but it is a women's O size. I have never worn it since I bought it. The following information is from AI: 【Design and Style】 The geometric pattern in red and pink is characteristic and visually appealing. The blue accents enhance the overall design. 【Functionality】 Designed for women, it uses a cut and material that considers ease of movement. It is perfect for table tennis matches and practice. - Brand: Nittaku - Model Name: JASPO - Size: 0 - Gender: Women's - Color: Red/Pink/Blue - Design: Geometric Pattern Thank you for viewing.