Buckle or tie: pick the closure first
The two closures size differently. The cotton belt with a buckle works like any leather belt: take a belt you already wear, measure from the buckle post to the hole you actually use, and match that figure in inches on the product page. Tie-on and adjustable styles skip the arithmetic altogether, because you set the length when you knot them at the front.
Where the belt sits
Narrow knotted belts thread through jeans loops and disappear until you look closely. Wider work, like the wide boho waist belt, is meant to sit at the natural waist over a dress, a kaftan or an untucked tunic, where it does the job a fabric sash does but holds its shape better. The fringe and beaded belts hang their ends down the front, so leave a few inches of tail when you tie them. Cotton cord between 3 mm and 5 mm gives these pieces enough body to stay flat across the waist rather than rolling into a rope.
Why cotton stays where you put it
Every belt here is knotted by hand in natural cotton, with wooden beads where a pattern asks for them. Cotton grips fabric in a way polished leather does not, so a knotted belt holds its place over a slippery dress instead of creeping up under the ribs. Sponge a mark with cool water and a little soap, press the wet patch between two towels, and dry the belt flat: hanging it damp stretches the cord permanently. Belts read well against the open knotting of our macrame clothing.