According to the Shein Kids Size Chart and the best Shein clothing sizes for children, size 80 in baby clothes on Shein fits babies from 9 months to 1 year old. The measurements for size 80 are:

• Bust: 50 cm (19.7 inches)
• Waist: 49 cm (19.3 inches)
• Hip: 52 cm (20.5 inches)

Its important to note that Shein offers size charts for men, women, and kids to help find the correct measurements quickly. Additionally, each product page on Shein has a "Size Guide" button that provides measurements in centimeters and inches, as well as instructions on how to measure to ensure the best fit.