King Size Silk Pillowcases | 20x36 Premium Mulberry Silk
POSHEY king size silk pillowcases measure 20 by 36 inches - the standard king pillowcase size. Crafted from 100% Grade 6A mulberry silk at 22-momme weight with a secure envelope closure. Available in 7 colors.
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King Size Silk Pillowcases: Built for Larger Pillows
POSHEY king size silk pillowcases measure 20 by 36 inches, designed specifically for king and California king pillows. The extra six inches of length compared to queen size ensures full coverage without stretching, maintaining a smooth, wrinkle-free silk surface across the entire pillow.
Same premium construction as every POSHEY product: 22-momme, Grade 6A mulberry silk with envelope closure. Available in 7 colors. Oeko-Tex Standard 100 certified and lab-tested to reduce friction by 43% versus cotton.
If your pillow measures approximately 20 by 36 inches, king is the right choice. Both standard king and California king pillows use the same pillowcase size. For pillows measuring 20 by 26 to 20 by 30 inches, see our queen size collection.
Read More About King Size Silk Pillowcases | 20x36 Premium Mulberry Silk
King Size Silk: Specifications and Fit Guide
King pillowcases are the largest standard pillowcase size in North America. Getting the right fit is essential to maximizing the anti-friction and skin benefits that silk provides.
King vs California King Pillowcases
Despite the different mattress dimensions (standard king is 76 by 80 inches, California king is 72 by 84 inches), both bed types use the same king-size pillow: 20 by 36 inches. POSHEY king pillowcases fit both. There is no separate California king pillowcase size.
Coverage and Silk Performance
Larger pillows provide more surface area for face and hair contact during sleep. Active sleepers who move across the pillow surface benefit from the additional coverage that king-size provides, ensuring consistent silk contact regardless of sleep position. The 20 by 36 inch dimension also provides adequate material for the envelope closure to secure the pillow without pulling the silk taut.
Care for King Size Silk
King size pillowcases should be washed with the same care as queen: cold water, gentle cycle, mild pH-neutral detergent. The larger size means slightly more water absorption, so ensure the pillowcase is not overloaded in the washing machine. Air drying flat is ideal. If using a dryer, tumble on the lowest heat setting and remove while slightly damp to prevent over-drying.
Frequently Asked Questions
What size is a king silk pillowcase?
POSHEY king size silk pillowcases measure 20 by 36 inches (51 x 91 cm). This fits standard king and California king pillows. The envelope closure keeps your pillow securely in place.
Will a king pillowcase fit a California king pillow?
Yes. Standard king and California king pillows use the same pillowcase size - 20 by 36 inches. POSHEY king size pillowcases fit both.