How to measure your body for competition bikinis

We will spilt the process into three sections




How to measure for your competition bikini bottoms


To establish where you fit on the size guide there are three main measure you will need to take.

The first is around your hips, this is the point where your hips are the widest (hip bone to hip bone). Take a measuring tape and wrap it all the way around your hips ideally where your high waisted briefs would sit comfortably. If you are in between sizes then choose the size that you feel will suit you come competition day. 

The second measurement is the widest part around your glutes area. Take a measuring tape right around the full circumference of your glutes and meet at the pubic bone (directly under the belly button)

Some ladies like to also measure the dip of the V scoop on the front of the briefs. Take the measuring tape from the inside of your legs (directly under the flower ) and pull straight upto the point directly belly the belly button were you feel most comfortable.

V Scoop Measurement

The V scoop is the point where the pants will sit at there lowest point of the mid-drift. You can completely customise which v scoop you prefer. For example you could be fitting into the size 6 range for hips and glutes however you may have a C scar you would like to cover or just prefer a much higher fabric coverage. Therefore you can choose a higher coverage such as the size 8 or 10 etc. Each customer is very different so I recommend you measure and get the perfect fit to suit you. Below is examples of my standard posing suit size guide.










If you are more than 4 weeks out from your show date and on course to drop more body fat around the hip area then I suggest going for the smaller size. However if you are pretty lean already and less than 4 weeks out then go for your current fit. If you have chosen briefs with connectors these come with an extra inch that is folded over at the seams hidden within the inside of the bikini. This means that if you need to make the bikini looser or tighter then it will be possible to make alterations.

Please note if you order bikini bottoms with no connectors then you WILL NOT have an extra inch to play with as these are made differently, so make sure to order your correct size.

We cater for all federation across all the categories

  • Bikini
  • Athletic/toned fitness
  • Figure / Body fitness
  • Bodybuilding


Size Hip Bone to Hip Bone Measurements (CM)
0 70cm or below
4 70-75cm
6 75-80cm
8 80-85cm
10 85-90cm
12 90-95cm
14 95cm+


Size Hip Around The Widest Point Of The Glutes – Measurements (CM)
0 70cm or below
4 75-80cm
6 80-85cm
8 85-90cm
10 90-95cm
12 95-100cm
14 105cm+

Please see size guide below for UK sizes converted into US, EU, AU and RUS sizes.

Size conversion

4 0 32 4 38
6 2 34 6 40
8 4 36 8 42
10 6 38 10 44
12 8 40 12 46
14 10 42 14 48

Choosing your brief coverage is mostly down to personal preference and depending on the competitor and chosen federation will determine the style of briefs chosen.

Some federations such as UKBFF/BNBF will require you to have 50% off your glute area covered, if this is your chosen federation then I recommend you go for the high waist or low waist briefs. These brief offer the most coverage on the front and back of the bikini bottoms.

Choosing your brief coverage








The front of the knickers are personal preference. The U shaped must be worn to 2bros federation in the bikini and wellness category. You will be allowed to wear the V shape if you really like them. But please note you may be marked down for incorrect dress code attire.

If you opt for no connectors and go for the all fabric knickers these will come with the V shape regardless if you are in figure or bikini the bikini category.


What is the difference with high and low waist briefs?

Both low and high waisted bottoms come with a 50% coverage on the glute area; however the high waist briefs aim to lengthen the legs as the fabric pulls over the hipbones create a V like shape. The V shape helps to create an illusion of a smaller waist (hello, yes please). These are ideal for UKBFF, PCA, BNBF and UKUP. 

Low waist briefs are a little different as they aim to lengthen the abdominal area as the fabric sits straight along the hipbone, making sure as much abdominal area is on show as possible. Got good abs ? Then these briefs are for you!! These are mostly suited to fashion focused, fitness federations such as Pure Elite and WBFF. 

What are Pro cut briefs and IFBB?

Pro cut bikini bottoms have less fabric than the 50% allowing for more booty out.  This helps emphasis the size and shape of the glutes as more definition can be witnessed showing a more fuller bum. These briefs can also come with or without connectors.


2bros events competition bikini

IFBB bikini bottoms are slightly less coverage than pro cut but are not a thong! They still have a good amount of fabric coverage on the upper glutes and are a great way to show of your glutes without looking like your wearing a thong. These bikini bottoms are best suited to NPC, PCA, 2BROSEVENTS.

What are Thong briefs?

Thong briefs are popular amongst athletic and toned fitness competitors within federations such as PCA and NABBA. This is because much more muscle can be seen due to the full glute area being on show. The thong style have everything on show no sagging or imperfections can be hidden as there is minimal fabric used.

Please note bikini athletes cannot wear these briefs as thongs are not permitted within this category. 

360 view of the different styles of bikini bottoms

How to choose my Bra Size?

When measuring your body for a competition bikini choosing your bra size can be a daunting thought! But do not worry there’s a few tips and trick that can help you decide your best size for show day.

Below is the Bra size guide for our bra styles, please follow the measurement guide against your personal measurements for best fit.

The first measurement you take is left to right horizontally. Then the second measurement you take is vertically, up and down the breast.  When taking both these measurements always cross the measuring tape at the highest point of the breast, the nipple. This should give you an accurate measurement.

The Triangle Bra

This style of bra is ideal for everyone as the fabric sits flat to the breast. Which helps minimise gapping between the breast and the bikini. Whats great about this bikini top is the adjustable straps this helps to boost the breast were needed. Furthermore this style comes with removing padding and allows room for extra padding to be inserted for that extra boost!











how to measure for your competition bikini

Bra size guide (Triangle Bra) Across (cm) Down (cm)
A 18 16
B 19 17
C 20 18
D 21 20
E 22 21
F 23 22
G 24 23
H 25 24

The wired bra

This wired bra has the most support as it works to push everything you have up to the front! Whether you have implants or natural breast the wired bra is great to keep everything in place. The wired bra comes with a push up effect to create a fuller breast structure to emphasise the cleavage. This style is one of the most demanded bras in bikini fitness due to its ability to create symmetry across the breasts and how beautiful it can be designed with diamonds. Competitors who still have a good amount of breast tissue are best suited to the push up bikini. 













how to measure for your competition bikini

Bra size guide

(Push Up Bra)

1. Up and Down



2. Across nipple (width)


A 21 18
B 22 19
C 23 20
D 23 21
E 25 22

The Moulded Bra

The bikini straps are adjustable which can help to boost the breast were needed big or small.  This bikini comes with 1 built in padding and allows room for extra padding to be inserted for that extra boost!

This style of top is ideal for us smaller chested girls as it helps to give the boobs that little bit more of a lift than the regular triangle tops. However the top is great for girl with implant too as it has a soft bra cup and you don’t experience the problems that can occur with underwires and understanding sizes. This bra also has a very forgiving size as it moulds around the boobs with minimal gaps.

This bra type is my most sold style as it incorporates with the benefits of both the other styles into one.












how to measure for your competition bikini

Bra size guide 1. Across 2. Up and Down
(Moulded Bra)    
  (cm) (cm)
A 13 17
B 14 18
C 15 19
D 16 20
E 17 21
F 18 22

360 view of different bra options available

What to expect when your bikini arrives

After Care of your bikini

Additional Support

If you are still struggling to find your perfect size please don’t stress. I are here to help send me a quick email with your latest progress picture front and back in a bikini and I can help size you up. In the meantime check out the bikini builder to see more bikini examples and designs!


Be sure to check with your chosen federations rules on what they expect from all competitors.

  • bikini rules
  • heel rules
  • tanning rule
  • fabric rules (patterned /non patterned
  • two piece tie back bikini / figure crisscross straps

Below are the most common bodybuilding federations for UK please see rules and make sure you order accordingly.


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