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Size Guide

Our sizing guide relates to approximate body measurements for the ages listed. Because every young body is different and every body likes a certain fit or feel when it comes to activewear, a sizing guide has been provided to be used as reference to assist you in making the best choice.


*If you do require a size exchange once your IMPI gear arrives, please email us at and we can help in sorting out an exchange so long as the items have not been worn.

Size guide

The best way to choose your size is to take your measurements as per the diagram and match it to the size tables above. Please measure and choose carefully so you are not disappointed when your Impi garment(s) arrives. 

*Please note there a slight variation relevant to ladies size predominantly in the bust area.

We know its not always easy to purchase online, so we have provided some of our model's measurements to help you work out which size will fit you best. Most of our running models prefer a snug fit for the shorts, so have opted for a smaller size in the running shorts and a size up in the strappy crop.



teen running apparel

Annabelle on the left age 17 yrs wears Girls 14/T6  and Girls 16/T8 strappy running bra

 Running crop and shorts teens

Miranda age 15 on the left  wears Girls 16 /T8 elastic running shorts, Girls 16/ T8 strappy running bra
Mary age 16 on the right  wears Ladies 10 in running crops and Girls 16/T8 in running shorts

Mia age 14 yrs wears Girls 14/T6 running shorts and Girls 14/ T6 running crop

Zara age 13 yrs wears Girls 12/T4 running shorts and Girls 12/T4 running crop

teen running apparel

Kebe age 12 yrs wears Girls 12/T4 running shorts and Girls 14/T6 running crop


teen running apparel

Claire age 10 wears Girls 10/ T2 running shorts and Girls 10/T2 in running crop

teen running apparel

Violet age 8 on the right wear Girls 8 /T0 in both running shorts and crop