Fit Guide

Nyssa's sizing is based on standard maternity sizing. If you wear a Medium in your maternity pants, we recommend you purchase a S/M of FourthWear® Underwear.

If you're between sizes (you sometimes wear a Medium and sometimes a Large) we recommend going with the smaller of the two sizes as FourthWear® Underwear is supremely stretchy.


FourthWear® Underwear

XXS / XS XS / S S / M M / L L / XL 1X / 2X 2X / 3X
Pant Size 0-2 2-4 4-8 8-10 10-16 18-22 22-26
Waist 26-32"
66-81 cm
28-34"
71-86 cm
30-36"
76-91 cm
33-39"
84-99 cm
36-41"
91-107 cm
37-45"
94-114 cm
41-49"
104-125 cm



FourthWear® Sustainable Bralette

XXS / XS S / M L / XL 1X / 2X 2X / 3X
Top Size 0-4 4-8 8-16 16-22 22-26
Band Size 22.625"
57.5 cm
24.5"
62 cm
28"
71 cm
31.625"
80 cm
38"
96.5 cm



VieWear™ Underwear

XS S M L XL 1X 2X
Pant Size 0-2 4-6 8-10 12-14 16-18 20-22 24-26
Waist 24"
61 cm
26"
66 cm
28"
71 cm
30.75"
78 cm
32.75"
83 cm
35.75"
91 cm
38.75"
98 cm