• Undies
    Size
    waist
    hip
    XXS
    23-24”
    33-34”
    XS
    24-25"
    35-36”
    S
    26-27”
    37-38”
    M
    28-29”
    39-40”
    L
    30-31”
    41-42”
    XL
    32-33”
    43-44”
    XXL
    34-36”
    45-47”
    XXXL
    36-38”
    47-49”

    In between sizes? We recommend sizing down!

  • Bralettes
    Size
    Band
    Bust
    Equivalent
    XXS
    24-26"
    30-32”
    28 A-DD
    XS
    26-28"
    32-34”
    30 A-DD
    S
    28-30”
    34-36”
    32 A-DD
    M
    30-32”
    36-38”
    34 A-DD
    L
    32-34”
    38-40”
    36 A-DD
    XL
    34-36”
    40-42”
    38 A-DD
    XXL
    36-38”
    42-44”
    40 A-DD
    XXXL
    38-40”
    44-46”
    42 A-DD

    For DDD or larger cup sizes, we recommend sizing up

  • Socks
    Size
    Women's Shoe
    Equivalent
    Men's Shoe
    Equivalent
    S/M
    5.5 - 8
    4.5 - 7
    M/L
    9 - 11.5
    8 - 11
  • Lounge
    Size
    Bust
    Waist
    Hip
    XS (00-0)
    27.5-30.5”
    25.5-26.5”
    35.5-36.5”
    S (2-4)
    30-33”
    27-28”
    37-38”
    M (6-8)
    32-34”
    29-30”
    39-40”
    L (10-12)
    34-37”
    31-33.5”
    41-42.5”
    XL (14-16)
    37-40”
    34-36”
    43-45”
    XXL (18-20)
    41-44”
    38-40.5”
    47-49.5”
Size
waist
hip
XXS
23-24”
33-34”
XS
24-25"
35-36”
S
26-27”
37-38”
M
28-29”
39-40”
L
30-31”
41-42”
XL
32-33”
43-44”
XXL
34-36”
45-47”
XXXL
36-38”
47-49”

Still unsure?
Visit our Fitting Room for more on fit and sizing.

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30% Off Select Styles

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Below-Belly Brief in Midnight Moon
Below-Belly Brief in Midnight Moon
Below-Belly Brief in Lunar
Below-Belly Brief in Cloud Nine

Below-Belly Brief

$27
Rated 4.5 out of 5
Based on 18 reviews
Get Points
Core
Midnight Moon
Size
XS
See the Knickey Size Guide
Visit the Fitting Room
See this style on Models
Questions? Chat with a Fit Expert
See our
Size Guide
See this style on Models
Visit the
Fitting Room
Chat with a Fit Expert
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Complete The Set
The Keyhole in Midnight Moon
XXS
XS
S
M
L
XL
XXL
XXXL
Select Size
The Keyhole in Lunar
XXS
XS
S
M
L
XL
XXL
XXXL
Select Size
The Keyhole in Cloud Nine
XXS
XS
S
M
L
XL
XXL
XXXL
Select Size
The Triangle in Midnight Moon
XXS
XS
S
M
L
XL
XXL
XXXL
Select Size
The Scoop in Lunar
XXS
XS
S
M
L
XL
XXL
XXXL
Select Size
The Tank in Cloud Nine
XXS
XS
S
M
L
XL
XXL
XXXL
Select Size
Get on the Waitlist
  • Description

    This low-profile style is strategically sewn for expandable comfort below the belly, alleviating pressure and providing barely-there comfort. With a custom criss-cross structure in the front and full seat coverage in the back, its stay-put leg elastic legs prevent unwanted movement at every stage of pregnancy through postpartum care.

  • Details
    • 95% Certified Organic Cotton with 5% elastane for stretch
    • Forgiving waistband that never digs in
    • Minimal leg elastics for secure placement
    • Ultra low-rise with full coverage seat
    • Criss-cross front panels for comfort and growth
    • Heat-stamped care label on back panel
  • Care

    Keep your Knickeys cheeky clean by washing in cold water and hanging dry to save energy. In a pinch, they can go in the dryer too. For bonus points, earth-friendly detergents are highly recommended.

  • Shipping & Returns

    Shipping & Returns

    • Free shipping on US orders over $75
    • US Flat Rate Shipping $5
    • International shipping & duties charges calculated at checkout
    • Carbon-Neutral Shipping

    All of our packaging is plastic-free and recyclable. If you have curbside recycling in your area, you should be able to pop all of our packaging in the bin, but you can use How2Recycle to double check!

    For more info on shipping, returns, & international orders swing by our FAQs

  • Impact


    Learn more about the impact of our products

  • End of Life

    When your Undies or Bralettes are ready to be retired, use our Recycling Program to turn your old undies into furniture batting, insulation, or even new thread. Plus, you can include old stuff from other brands, too! Here's to closing the loop.

This low-profile style is strategically sewn for expandable comfort below the belly, alleviating pressure and providing barely-there comfort. With a custom criss-cross structure in the front and full seat coverage in the back, its stay-put leg elastic legs prevent unwanted movement at every stage of pregnancy through postpartum care.

Below-Belly Brief
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