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Need help choosing your size?

While its best to measure as per our size guide page, here are some more ways to work out your preferred size remembering everyone likes a slightly different "fit".

For a tight fit, some IMPIs wear one size down. For a comfortable fit, we recommend going a size up.

    As a rough guide, our sizes are similar to the small ladies sizes 0-8. The IMPI bust/chest measurements will be slightly smaller for IMPI sizes as our product is designed for teens and tweens To show this slight variation we have placed a T in front of the relevant ladies size.

    Running shorts

    XS  Age 8 years  T0
    S Age 10 Years T2
    M = Ladies size 4 Age 12 years   T4
    L = Ladies  size 6 or Ladies XS Age 14years  T6
    XL =  Ladies size 8 or Ladies S Age 16 years + T8


    Strappy Running Crops

    XS  Age 8 years  T0
    S Age 10 years  T2
    M = Ladies size 4 Age 12 years  T4
    L = Ladies size 6 or Ladies XS Age 14 years  T6
    XL = Ladies size 8 or Ladies S Age 16 years + T8
    2XL = Ladies size 10 or Ladies M T10


    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.

    Please do not hesitate to contact us if you need any further assistance in selecting the right size for you! We value your feedback and would love to know how our garments are fitting and where we can improve as we grow our business. Contact us at

      Running crop and shorts teens

    Miranda Age 15 /and Mary Age 16

    Height -168cm tall /172cm
    Waist - 72cm /76cm
    Chest - 84cm/91cm
    Hips - 90cm/93cm

    Miranda wears - T8 elastic running shorts, T8 strappy running bra

    Mary wears T10 in running crops and T8 in running shorts

    Age 18
    Height -161cm tall 
    Waist - 65cm 
    Chest - 73cm
    Hips - 81cm

    Wears -T4 shorts for longer fit and T0 for tighter fit;  T4 strappy running bra

    Keira strappy crop and elastic running shorts

    Age 16
    Height -163cm tall 
    Waist - 64cm 
    Chest - 75cm
    Hips - 75cm

    Wears - T2 elastic running shorts and T4 strappy running bra


    Ella running strappy and shorts

    Age 14
    Height -131cm tall 
    Waist - 62cm 
    Chest - 67cm
    Hips - 70cm

    Wears - T4 elastic running shorts a T2 strappy running bra


    Ava kids running shorts and crop

    Age 11
    Height -131cm tall 
    Waist - 57cm 
    Chest - 65cm
    Hips - 67cm
    Wears - T2 running shorts and T0



    Age 9 
    Height -123cm tall 
    Waist - 55cm 
    Chest - 63cm
    Hips - 63cm
    Wears -T2 running shorts and T 4 running crop

    Kiddies range

    Age 4 (Eva on the right)
    Height -110cm tall 
    Waist - 49cm 
    Chest - 57cm
    Hips - 56cm

    Wears - T0 in both running shorts and crop


    Size guide


    Size Guide
     Approx age 8 years 10 years 12 years 14 years 16 years +
     Impis XS = T0  S = T2 M = T4  L = T6 XL = T8
    Bust 63-65cm 65-68cm 68-74cm 74-81cm 81-89cm
    Waist 58-62cm 62-64cm 64-68cm 68-72cm 72-76cm
    Hips 69-73cm 73-77cm 77-82cm 82-87cm 87-91cm