'Oh No' Proof Underwear Sizing Chart
Size Hips (in) Hips (cm)
XS 25” - 27” 63 - 68cm
S 26” - 30” 66 - 76cm
M 31” - 35” 78 - 88cm
L 36” - 40” 91 - 101cm
XL 41” - 44” 104 - 111cm
XXL 45” - 48” 114 - 121cm
Our period panties are made to fit teens and tweens. For the adult version check out Knix.
THE YOUR WAY BRA SIZING CHART
Size Band Cup
XS 28” - 30” A/B
S 30” - 32" A/B
S+ 30” - 32" C/D
M 32” - 34” A/B
M+ 32” - 34” C/D
M++ 32” - 34” DD/E
L 34” - 36” A/B
L+ 34” - 36” C/D
L++ 34” - 36” DD/E
XL 36” - 38” A/B
Use your band size to find your Knixteen bra size!
THE SPORTY BRA SIZING CHART
Size Band
XS 28” - 30”
S 30” - 32"
M 32” - 34”
L 34” - 36”
XL 36” - 38”
Use your band size to find your Knixteen bra size! Don't worry about your cup size, each size fits up to a DD cup!
THE SUPER BRALETTE SIZING CHART
Size Band
XS 28” - 30”
S 30” - 32"
M 32” - 34”
L 34” - 36”
XL 36” - 38”
Use your band size to find your Knixteen bra size! Don't worry about your cup size, each size fits up to a DD cup!
THE T-SHIRT BRA SIZING CHART
Size Band Cup
XS 28” - 30” A/B
S 30” - 32" A/B
S+ 30” - 32" C/D
S++ 30” - 32" DD/E
M 32” - 34” A/B
M+ 32” - 34” C/D
M++ 32” - 34” DD/E
L 34” - 36” A/B
L+ 34” - 36” C/D
L++ 34” - 36” DD/E
XL 36” - 38” A/B
Use your band size to find your Knixteen bra size!
THE EVERYDAY BRA SIZING CHART
Size Band Cup
XS 28” - 30” A/B
S 30” - 32" A/B
S+ 30” - 32" C/D
M 32” - 34” A/B
M+ 32” - 34” C/D
L 34” - 36” A/B
L+ 34” - 36” C/D
XL 36” - 38” A/B
Use your band size to find your Knixteen bra size!

Teen Underwear Sizing Chart For Period Panties

'Oh No' Proof Underwear
Size Hips (in) Hips (cm)
XS 25” - 27” 63 - 68cm
S 26” - 30” 66 - 76cm
M 31” - 35” 78 - 88cm
L 36” - 40” 91 - 101cm
XL 41” - 44” 104 - 111cm
XXL 45” - 48” 114 - 121cm
Shop Underwear
Our period panties are made to fit teens and tweens. For the adult version check out Knix.
The EVERYDAY BRA
Size Band Cup
XS 28” - 30” A/B
S 30” - 32" A/B
S+ 30” - 32" C/D
M 32” - 34” A/B
M+ 32” - 34” C/D
L 34” - 36” A/B
L+ 34” - 36” C/D
XL 36” - 38” A/B
Shop this Bra
Use your band size to find your Knixteen bra size!
The T-SHIRT BRA
Size Band Cup
XS 28” - 30” A/B
S 30” - 32" A/B
S+ 30” - 32" C/D
S++ 30” - 32" DD/E
M 32” - 34” A/B
M+ 32” - 34” C/D
M++ 32” - 34” DD/E
L 34” - 36” A/B
L+ 34” - 36” C/D
L++ 34” - 36” DD/E
XL 36” - 38” A/B
Shop this Bra
Use your band size to find your Knixteen bra size!
THE SPORTY BRA
Size Band
XS 28” - 30”
S 30” - 32"
M 32” - 34”
L 34” - 36”
XL 36” - 38”
Shop this Bra
Use your band size to find your Knixteen bra size! Don't worry about your cup size, each size fits up to a DD cup!
THE YOUR WAY BRA
Size Band Cup
XS 28” - 30” A/B
S 30” - 32" A/B
S+ 30” - 32" C/D
M 32” - 34” A/B
M+ 32” - 34” C/D
M++ 32” - 34” DD/E
L 34” - 36” A/B
L+ 34” - 36” C/D
L++ 34” - 36” DD/E
XL 36” - 38” A/B
Shop this Bra
Use your band size to find your Knixteen bra size!
THE SUPER BRALETTE
Size Band
XS 28” - 30”
S 30” - 32"
M 32” - 34”
L 34” - 36”
XL 36” - 38”
Shop this Bra
Use your band size to find your Knixteen bra size! Don't worry about your cup size, each size fits up to a DD cup!