4th Gen X 100% Non-Slip Wireless Strapless Bra

Size Guide

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  How to Measure

  Use a soft tape measure, keep it snug but not tight, and measure straight across your back.

  Step 1

  Underbust Circumference

  Measure your underbust at its tightest — the circumference right under your busts.

  Step 2

  Overbust Circumference

  Measure your overbust circumference at the fullest point of your bust.

  Underbust (cm)

  Overbust (cm)

  Enter both measurements to see your size

  Full Reference Table

  Lightly-Lined Bras & Bralettes come in every size below. Push Up Bras use the same sizes, but only in cups A–C and bands 32/70 to 40/90 (S to XXL).

  Underbust	Band	Overbust Measurements (cm)
  		Cup A	Cup B	Cup C	Cup D	Cup E	Cup F
  63cm	30/65	71–73cm XS	73–75.5cm XS	75.5–78cm XS	78–80.5cm –	80.5–83cm –	83–85.5cm –
  64cm	30/65	72–74cm XS	74–76.5cm XS	76.5–79cm XS	79–81.5cm –	81.5–84cm –	84–86.5cm –
  65cm	30/65	73–75cm XS	75–77.5cm XS	77.5–80cm XS	80–82.5cm –	82.5–85cm –	85–87.5cm –
  66cm	30/65	74–76cm XS	76–78.5cm XS	78.5–81cm XS	81–83.5cm –	83.5–86cm –	86–88.5cm –
  67cm	30/65	75–77cm XS	77–79.5cm XS	79.5–82cm XS	82–84.5cm –	84.5–87cm –	87–89.5cm –
  68cm	32/70	76–78cm S	78–80.5cm S	80.5–83cm S	83–85.5cm S+	85.5–88cm S+	88–90.5cm S+
  69cm	32/70	77–79cm S	79–81.5cm S	81.5–84cm S	84–86.5cm S+	86.5–89cm S+	89–91.5cm S+
  70cm	32/70	78–80cm S	80–82.5cm S	82.5–85cm S	85–87.5cm S+	87.5–90cm S+	90–92.5cm S+
  71cm	32/70	79–81cm S	81–83.5cm S	83.5–86cm S	86–88.5cm S+	88.5–91cm S+	91–93.5cm S+
  72cm	32/70	80–82cm S	82–84.5cm S	84.5–87cm S	87–89.5cm S+	89.5–92cm S+	92–94.5cm S+
  73cm	34/75	81–83cm M	83–85.5cm M	85.5–88cm M	88–90.5cm M+	90.5–93cm M+	93–95.5cm M+
  74cm	34/75	82–84cm M	84–86.5cm M	86.5–89cm M	89–91.5cm M+	91.5–94cm M+	94–96.5cm M+
  75cm	34/75	83–85cm M	85–87.5cm M	87.5–90cm M	90–92.5cm M+	92.5–95cm M+	95–97.5cm M+
  76cm	34/75	84–86cm M	86–88.5cm M	88.5–91cm M	91–93.5cm M+	93.5–96cm M+	96–98.5cm M+
  77cm	34/75	85–87cm M	87–89.5cm M	89.5–92cm M	92–94.5cm M+	94.5–97cm M+	97–99.5cm M+
  78cm	36/80	86–88cm L	88–90.5cm L	90.5–93cm L	93–95.5cm L+	95.5–98cm L+	98–100.5cm L+
  79cm	36/80	87–89cm L	89–91.5cm L	91.5–94cm L	94–96.5cm L+	96.5–99cm L+	99–101.5cm L+
  80cm	36/80	88–90cm L	90–92.5cm L	92.5–95cm L	95–97.5cm L+	97.5–100cm L+	100–102.5cm L+
  81cm	36/80	89–91cm L	91–93.5cm L	93.5–96cm L	96–98.5cm L+	98.5–101cm L+	101–103.5cm L+
  82cm	36/80	90–92cm L	92–94.5cm L	94.5–97cm L	97–99.5cm L+	99.5–102cm L+	102–104.5cm L+
  83cm	38/85	91–93cm XL	93–95.5cm XL	95.5–98cm XL	98–100.5cm XL+	100.5–103cm XL+	103–105.5cm XL+
  84cm	38/85	92–94cm XL	94–96.5cm XL	96.5–99cm XL	99–101.5cm XL+	101.5–104cm XL+	104–106.5cm XL+
  85cm	38/85	93–95cm XL	95–97.5cm XL	97.5–100cm XL	100–102.5cm XL+	102.5–105cm XL+	105–107.5cm XL+
  86cm	38/85	94–96cm XL	96–98.5cm XL	98.5–101cm XL	101–103.5cm XL+	103.5–106cm XL+	106–108.5cm XL+
  87cm	38/85	95–97cm XL	97–99.5cm XL	99.5–102cm XL	102–104.5cm XL+	104.5–107cm XL+	107–109.5cm XL+
  88cm	40/90	96–98cm XXL	98–100.5cm XXL	100.5–103cm XXL	103–105.5cm XXL+	105.5–108cm XXL+	108–110.5cm XXL+
  89cm	40/90	97–99cm XXL	99–101.5cm XXL	101.5–104cm XXL	104–106.5cm XXL+	106.5–109cm XXL+	109–111.5cm XXL+
  90cm	40/90	98–100cm XXL	100–102.5cm XXL	102.5–105cm XXL	105–107.5cm XXL+	107.5–110cm XXL+	110–112.5cm XXL+
  91cm	40/90	99–101cm XXL	101–103.5cm XXL	103.5–106cm XXL	106–108.5cm XXL+	108.5–111cm XXL+	111–113.5cm XXL+
  92cm	40/90	100–102cm XXL	102–104.5cm XXL	104.5–107cm XXL	107–109.5cm XXL+	109.5–112cm XXL+	112–114.5cm XXL+
  93cm	42/95	101–103cm 3XL	103–105.5cm 3XL	105.5–108cm 3XL	108–110.5cm 3XL+	110.5–113cm 3XL+	113–115.5cm 3XL+
  94cm	42/95	102–104cm 3XL	104–106.5cm 3XL	106.5–109cm 3XL	109–111.5cm 3XL+	111.5–114cm 3XL+	114–116.5cm 3XL+
  95cm	42/95	103–105cm 3XL	105–107.5cm 3XL	107.5–110cm 3XL	110–112.5cm 3XL+	112.5–115cm 3XL+	115–117.5cm 3XL+
  96cm	42/95	104–106cm 3XL	106–108.5cm 3XL	108.5–111cm 3XL	111–113.5cm 3XL+	113.5–116cm 3XL+	116–118.5cm 3XL+
  97cm	42/95	105–107cm 3XL	107–109.5cm 3XL	109.5–112cm 3XL	112–114.5cm 3XL+	114.5–117cm 3XL+	117–119.5cm 3XL+
  98cm	44/100	106–108cm –	108–110.5cm –	110.5–113cm –	113–115.5cm 4XL+	115.5–118cm 4XL+	118–120.5cm 4XL+
  99cm	44/100	107–109cm –	109–111.5cm –	111.5–114cm –	114–116.5cm 4XL+	116.5–119cm 4XL+	119–121.5cm 4XL+
  100cm	44/100	108–110cm –	110–112.5cm –	112.5–115cm –	115–117.5cm 4XL+	117.5–120cm 4XL+	120–122.5cm 4XL+
  101cm	44/100	109–111cm –	111–113.5cm –	113.5–116cm –	116–118.5cm 4XL+	118.5–121cm 4XL+	121–123.5cm 4XL+
  102cm	44/100	110–112cm –	112–114.5cm –	114.5–117cm –	117–119.5cm 4XL+	119.5–122cm 4XL+	122–124.5cm 4XL+
  103cm	46/105	111–113cm –	113–115.5cm –	115.5–118cm –	118–120.5cm 5XL+	120.5–123cm 5XL+	123–125.5cm 5XL+
  104cm	46/105	112–114cm –	114–116.5cm –	116.5–119cm –	119–121.5cm 5XL+	121.5–124cm 5XL+	124–126.5cm 5XL+
  105cm	46/105	113–115cm –	115–117.5cm –	117.5–120cm –	120–122.5cm 5XL+	122.5–125cm 5XL+	125–127.5cm 5XL+
  106cm	46/105	114–116cm –	116–118.5cm –	118.5–121cm –	121–123.5cm 5XL+	123.5–126cm 5XL+	126–128.5cm 5XL+
  107cm	46/105	115–117cm –	117–119.5cm –	119.5–122cm –	122–124.5cm 5XL+	124.5–127cm 5XL+	127–129.5cm 5XL+

  *Tip: For Push Up bras, C Cup ladies can go up 1 size for a fuller fit.
  *I’M IN intimates are handmade, thus there may be an allowance of +/- 1cm on the measurements.
  *Sizing guide to be used as reference as your fit experience may vary due to cutting & manufacturing difference.
  *New to I’M IN? We suggest sticking to your usual size and giving it a try when it arrives! If you find that you need a different fit, you can exchange it within 30 days, as long as it’s still in its original selling condition.

  for Size Guide & Calculator.