Coop Pillow & Bedding

Pillow Size Chart: How to Choose the Best Pillow Size & Shape for Better Sleep

Written by: Megan Keivens

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Published on

Choosing the right pillow and pillow size is about more than matching your mattress size. Today’s best pillows are designed around how you sleep — including your sleep position, body frame, shoulder width, and temperature preferences.


While standard, queen, and king pillows are still the most common sizes, ergonomic pillow shapes like Crescent and Cut-Out pillows are becoming increasingly popular for side sleepers and anyone looking for better neck and shoulder support.


In this guide, we’ll walk through:


  • Standard pillow size / dimensions
  • Which pillow size works best for your bed
  • How sleep position affects pillow choice
  • The difference between traditional and ergonomic pillow shapes
  • How to choose the best adjustable pillow for your sleep style

Pillow Size Chart

Pillow Type Pillow Size Best For

Standard Pillow		 20" x 26"
Twin and full beds, smaller sleepers

Queen Pillow
20" x 30"
Queen beds and combination sleepers

King Pillow
20" x 36"
King beds and sleepers who move frequently

Body Pillow
20" x 54"

Side sleepers and pregnancy support

Crescent Pillow
18" x 28"
Side and back sleepers needing shoulder support

Cut-Out Pillow
18" x 28"

Side sleepers and neck pain relief


The newer ergonomic shapes are designed to support spinal alignment more naturally than traditional rectangular pillows. Coop’s Crescent and Cut-Out pillows both feature adjustable fill and contoured designs that help reduce pressure around the neck and shoulders.



Traditional vs Ergonomic Pillow Shapes

Pile of pillows

For years, most pillows came in a simple rectangular shape. While traditional pillows still work well for many sleepers, ergonomic pillow designs are becoming more popular because they address common sleep complaints like neck stiffness, shoulder pressure, and overheating.


Traditional Pillows


Traditional pillows are versatile and work well for:


  • Back sleepers
  • Stomach sleepers
  • Guest rooms
  • Decorative bedding setups

Adjustable traditional pillows also allow sleepers to customize loft and firmness for a more personalized feel.


Crescent Pillows


Crescent-shaped pillows are designed with curved edges that fit more naturally around the shoulders. This shape can help:


  • Reduce shoulder compression
  • Support spinal alignment
  • Keep the head centered while sleeping
  • Improve comfort for side and combination sleepers

The ergonomic curve is especially helpful for sleepers who wake up with neck tension or shoulder discomfort.


Cut-Out Pillows


Cut-Out pillows feature a recessed corner area that creates additional space for the shoulder. These pillows are ideal for:


  • Dedicated side sleepers
  • Sleepers with neck pain
  • People who rotate between side and back sleeping
  • Those looking for pressure relief around the shoulder and upper arm

The shape helps reduce strain that can happen when the shoulder pushes against a traditional pillow overnight.

Best Pillow Size & Shape by Sleep Position

Best Pillow for Side Sleepers


Side sleepers typically need:


  • More loft
  • Better neck support
  • Pressure relief around the shoulders

A Queen or King pillow paired with an ergonomic shape like a Crescent or Cut-Out design can help maintain healthier alignment through the night.


Best Pillow for Back Sleepers


Back sleepers often do best with:


  • Medium loft
  • Adjustable fill
  • Balanced head and neck support

Traditional adjustable pillows or Crescent designs both work well depending on personal preference.


Best Pillow for Stomach Sleepers


Stomach sleepers usually prefer:


  • Softer pillows
  • Lower loft
  • Smaller pillow profiles

A traditional adjustable pillow with less fill is often the best option.

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