Size Guide

  1. Take measurements using a soft tape measure.
  2. Measure bust, waist, and hips.
If you are in between sizes, we recommend sizing up for a better fit. Especially for tops due to the inserts and using IBTC sizing vs. traditional companies who size on 36C. We’re all about IBTC sizing here!
SIZING TIP: Size up in the Seaside top from your normal bikini top. Montauk runs true to size. 

    Top Fit

    Size  Bust Size (in) Cup Size Underbust Size (in) Underbust Size (cm) Weight
    XS 28-31 AA 25-28 64-72 <105
    S 32-35 A 29-32 74-82 <125
    M 36-39 B-C 33-36 84-92 <145
     L 40-44 C 37-41 95-105 <165

      

    Bottom Fit

    Size  waist size (in) waist size (cm) hips (in) hips (cm)
    XS 24-25 61-63.5 29-32 76-81
    S 26-27 66-68.5 32-35 81-86
    M 28-29 71.5-74 35-38 86-91
     L 30-31 76-79 38-41 91-99

     

    One-Piece Fit

    Size  Bust Size (in) Bust Size (cm) cup size waist size (in) waist size (cm) hips (in) hips (cm) torso (in) torso (cm)
    XS 28-31 72-80 AA-A 24-25 61-63.5 34-35 86.5-89 58-59 147-150
    S 32-35 82-90 A-B 26-27 66-68.5 36-37 92-94 59-60 150-152.5
    M 36-39 92-100 B_C 28-29 71.5-74 38-39 96.5-99 60-61 152.5-155
     L 40-44 102-112 B-C 30-31 76-79 40-41 102-104 61-62 155-157.5
    Size Chart