As of 2016, Chico's sizing charts are very reliable because the retailer does not follow the patterns of traditional sizing. Instead, the sizing charts list specific chest, waist and hip measurements for each of Chico's sizes.
Chico's sizes range from 000 through 4, with both whole and half sizes available for many items. This corresponds with sizes 0 to 22 in traditional sizing.
To view current sizing charts, click on Customer Care at Chicos.com, and select Size Charts. The website includes a missy size chart, petites size chart and belt size chart. Customers who have questions about Chico's unique sizing can receive assistance via live chat at Chico's.com, through the company's toll-free phone line or in person at a Chico's store.