We have many different brands at  Idaho Thunderbird, making it tough to have an exact sizing chart. Most of our items are Young Contemporary. If you need measurements of any garment please email us at

We will be happy to send you pictures of the garment laid flat with measurements. 

Use this sizing chart as a general rule of thumb:


                2/4         6/8       10/12

Bust:     35-36     37-38      39-40

Waist:   27-28     29-30      31-32

Hip:      36-37      38-39     40-41


~We try to post the models size in the pictures on the website and social media to help you with sizing ~

~Most of our hats are OSFM, One Size Fits Most...if there is sizing we will mention it on the website~