If there is only one seam that holds the front and the back of the pillow together, and the seam runs along the outer edge of the pillow, it's a knife-edge pillow.
Eternity Rings: Channel and prong settings are available, including a unique knife-edge design using two angled rows of stones.
The construction is a bit more complex than the construction of a knife-edge pillow; the shape is created using more seams.
Obviously ruffled pleats and fancy designs get a bit more complicated, but knife-edge styles are quite simple.
If you want a sleek and knife-edge creased look, go for a synthetic blend or a satin or silk combination.
You can easily identify a knife-edge pillow by looking at the seams around the edges of the pillow.
Usually, the edges of a knife-edge pillow are thinner than the center of the pillow is.
Unlike knife-edge pillows, box edge pillows are uniformly thick.
The most minimalist style is the knife-edge.
Knife-edge pillows are not uniformly thick.