Take a tape around the widest part of your thigh, or around your natural waist, and set the slider to that number. What stays on screen is every piece whose own size table reaches that number, either inside a printed range or at the first size big enough. 55 of the 97 pieces here publish a table with a measurement in it, so those are the ones this can answer for.

Thigh high socks

Thigh high socksPlus

SkirtPlus

Thigh high socksPlus

SkirtPlus

DressPlus

SkirtPlus

Thigh high socksPlus

Garter beltPlus

Fishnet stockingsPlus

Overall dressPlus

JumpsuitPlus

Garter beltPlus

SkirtPlus

BodysuitPlus

SkirtPlus

SkirtPlus

DressPlus

SkirtPlus

SkirtPlus

Thigh high socksPlus

Overall dressPlus

JumpsuitPlus

Garter beltPlus

SkirtPlus

Overall dressPlus

DressPlus

DressPlus

SkirtPlus

Overall dressPlus

Overall dressPlus

SkirtPlus

Overall dressPlus

SkirtPlus
Thigh high socks

JumpsuitPlus

SkirtPlus

SkirtPlus

Overall dressPlus

JumpsuitPlus

SkirtPlus

SkirtPlus

JumpsuitPlus

SkirtPlus

Overall dressPlus
Fishnet stockings

SkirtPlus

DressPlus

OverallsPlus

SkirtPlus

Overall dress

Overall dress

Skirt
Fishnet stockings

Skirt
No size table in the catalog reaches that measurement, so the honest answer is that this brand does not list a piece for it in this section. Try the neighbouring measurement, or switch to a different part of the body if the piece you want is a skirt rather than hosiery.
Thigh. Stand up straight, feet together, and put the tape around the widest part of one thigh, usually two or three inches below the crotch. Keep the tape level and snug without pulling it into the skin. That single number decides whether a stay up stays up.
Waist. Find the narrowest part of the torso, roughly at the level of your navel or a little above it. Breathe out normally, do not hold your stomach in, and read the tape where it meets.
Hip. Around the fullest part of the seat, with the tape level front to back. For skirts this is usually the number that decides the size, not the waist.