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Good American Size Guide: What Size Am I in Good American? Fit Advice & UK Sizing Help

Author: Stylist and brand team at Tellar

Date: 2025

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Good American is a trailblazing brand with a bold mission: inclusive sizing, curve-enhancing cuts, and style without compromise. Launched by Khloé Kardashian and Emma Grede, it quickly became known for denim that actually fits, catering to women of all shapes and sizes—from UK 4 to UK 28.

But here’s the twist: Good American uses US sizing, runs differently across collections, and blends stretch with structure in ways that can confuse even seasoned online shoppers. If you’ve found yourself asking, what size am I in Good American jeans or bodysuits?—you’re in the right place.

Tellar.co.uk makes it easy. We analyse your actual body measurements (not just a size guess) to recommend your perfect fit across Good American and 1,500+ other brands. Accurate, fast, and always free.

Why Good American Sizing Is So Unique

Good American champions body confidence and inclusive sizing, but their sizing model blends traditional US sizing with a numerical 0–8 scale, which doesn’t directly match standard UK sizes.

In denim and most fitted pieces, you'll often see sizing like:

  • 0 = XS

  • 1 = S

  • 2 = M

  • 3 = L

  • 4 = XL

  • 5 = 2XL

  • …and so on, up to size 8 (UK 28 equivalent)

This system is powerful for inclusivity—but it makes size guessing difficult without a proper guide.

🔗 That’s why Tellar’s size tool is so useful for Good American

Good American Size Conversion (US to UK)

Here’s a rough size conversion for reference:

Good American Size

UK Size

US Size (traditional)

0

6

2

1

8

4

2

10

6

3

12

8

4

14

10

5

16

12

6

18

14

7

20

16

8

22–24

18–20

🟡 Keep in mind: some pieces run large due to stretch fabrics. That’s why measurement-based sizing is far more reliable.

How Does Good American Fit by Category?

1. Good American Jeans

The brand’s flagship product. Known for stretch, sculpt, and lift.

  • Most styles are high-rise and body-contouring

  • Sizes are consistent across denim collections, but stretch levels vary

  • Skinny fits like the “Good Waist” tend to feel snug but forgiving

Fit Tip: If between sizes, size down for sculpted styles, up for rigid denim.

🔗 Compare this with Massimo Dutti or Replay denim fits

2. Bodysuits and Tops

Good American bodysuits are designed to hug the figure, with inclusive bust and torso proportions.

  • Stretchy styles run true to size

  • Fitted ribbed or structured bodysuits can feel snug in the arms and bust

  • Shoulder seams are designed with broader frames in mind

Fit Tip: If you’re long in the torso, consider sizing up. Otherwise, stick with your Tellar match.

3. Swimwear and Activewear

Designed with support and sculpting in mind. Most swimwear features double lining and adjustable straps.

  • Leg openings can feel high-cut

  • Sports bras often come in dual sizing (e.g. 2 = UK 10–12)

Fit Tip: Choose based on your bust and hip measurements, not just dress size. Tellar’s profile builder handles this automatically.

4. Dresses and Jumpsuits

Dresses tend to be fitted through the waist and hips, often with stretch materials. Jumpsuits follow a slightly more generous cut but can be short in the rise for tall frames.

Fit Tip: Prioritise waist and hip measurements over bust for most dresses. Size up if you’re taller than 5’8”.

🔗 Compare fit to other bodycon brands like House of CB or Self Portrait

How to Measure Yourself for Good American

The key to nailing your Good American fit is using real measurements. Grab a soft measuring tape and take:

  • Bust – Fullest part, with arms relaxed

  • Waist – Narrowest point, usually just above the navel

  • Hips – Widest part across the bottom

Once you have them, input them once at Tellar.co.uk and get instant, accurate size recommendations for Good American (and all your other favourite brands).

No more trial and error. Just precision fit, every time.

Does Good American Run Big or Small?

Here’s what we’ve found based on user data:

  • Jeans and activewear: Generally true to size, with stretch allowing some flexibility

  • Bodysuits and structured dresses: Can run small through the bust and torso

  • Oversized or relaxed styles: Stick with your true size for the intended look

Still unsure? Let Tellar.co.uk do the maths. We use your largest measurement (bust, waist or hips) to match you to the right size in seconds.

Similar Brands to Explore

If you love Good American’s fit, you might also be shopping:

Get the Right Size First Time with Tellar.co.uk

Good American is all about confidence, inclusivity, and celebrating every curve. But confidence starts with clothes that actually fit.

That’s why Tellar.co.uk makes it simple to:

  • Create your profile in 60 seconds

  • Choose your preferred unit (cm or inches)

  • See your best size in Good American and 1,500+ brands

  • Re-check your size anytime you shop online

  • Avoid returns and wasted purchases

It’s quick, private, and always free to use.

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