| Waist | Hip | Size | |
| XXS | 23-24" | 33-34" | Y14-00 |
| XS | 24-25" | 35-36" | 0-2 |
| S | 26-27" | 37-38" | 4-6 |
| M | 27-29" | 39-40" | 8-10 |
| L | 30-32" | 41-42" | 12-14 |
| XL | 33-35" | 43-44" | 16-18 |
| 1X | 37-39" | 44-46" | 16-18 |
| 2X | 41-43" | 48-50" | 20-22 |
| 3X | 45-47" | 52-54" | 24-26 |
| 4X | 49-51" | 56-58" | 28-30 |
| 5X | 53-55" | 60-62" | 32-34 |
For the perfect fit, don’t take a wild guess — take your hip
measurement! Standing with your feet together, wrap a soft
measuring tape around the widest part of your lower hip.
Check out our Model Size Guide
The fabric for our BASE undies is designed to have a
snug fit that moves with you. If you're between sizes, we
recommend trying the larger size for BASE.
Aisle undies feature a specially engineered lining that combines super-absorbent Truetex™ technology with a leak-proof lining to keep you dry and feelin’ fly.
8X as much as a standard disposable! Our undies absorb 4 tampons worth of fluid on their own, or 8 tampons worth when you wear with the included booster.
Nope! Our undies were built to completely replace pads and tampons. They make great backup protection with tampons or menstrual cups, too.
Our undies absorb 4 tampons worth of fluid on their own, but if you need a little extra you can add the optional booster for an extra 4 tampons worth. Just tuck the ends into the slits at either end of the gusset.
It’s not that complicated - our undies were made to fit into your regular laundry routine. Just rinse out in cool water, then wash and dry with your regular laundry. As with any garment, wash with like colors.
