Sheets materials & construction

The Casper sheets are designed in the USA with 100% Supima® cotton from California.

Breathable weave

Our percale weave is more breathable and longer lasting than other popular weaves.

Ideal thread count

We discovered that 400 two-ply threads is the perfect count to balance softness, strength, and breathability.

Extra-long staple Supima® cotton

Grown in California’s Central Valley, our cotton is four times stronger than the industry average, so the threads don’t pill or pull.

Person in Moon

Sheets details

Measurements & dimensions

Fitted Sheet
(W x L x D)

90 x 190 x 35 cm


135 x 190 x 35 cm


150 x 200 x 35 cm

Super King

180 x 200 x 35 cm

Duvet Cover
(W X L)

140 x 200 cm


200 x 200 cm


225 x 220 cm

Super King

260 x 220 cm

Pillow Case
(W X L)

52 x 77 cm

Super King

52 x 92 cm


100% extra-long staple Supima® cotton.

Shipping info

In the UK, we ship via UPS.

Shipping costs

Free shipping and free returns in the UK.


1-year limited warranty. Read More

Frequently asked questions

See all sheets FAQs