How many inches will this raise a person in a desk chair and will it retain that height?

It is 4 inches and retains height. I purchased to raise my height when sitting in desk chair for use with video camera. It works perfectly.

How do you Measure wheelchair for correct cushion

Measure the width and depth of the seat. The cushion should be an inch less, at least, the measured width. The thickness of the cushion might cause the chair height to be adjusted. The biggest problem is the cushion density. Firm can mean a cushion with little give to hard as a board.

No it will compress to fit your bottom.

Will this work in an adult power chair?

It works o.k. in a lift chair as far as size, ... it's perfect, however, the one I rec'd, although it was good in workmanship & materials, it was way too hard to sit in 24 / 7, and unfortunately I developed bed sores and had to quit using it.

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YOUFI Extra Thick Large Seat Cushion -19 X 17.5 X 4 Inch Gel Memory Foam Cushion with Carry Handle Non Slip Bottom - Pain Relief Coccyx Cushion for Wheelchair Office Chair (Black (1PACK))

Product ID: 327332788

Details

Brand
YOUFI
Colour
Black
Fill material
Memory Foam
Size
19'' x 17.5''
Special features
Portable

📏19" x 17.5" x 4" large size

🛑Non-slip bottom for stability

🧠4-inch thick gel memory foam core

Description

💺 Upgrade your seat, upgrade your life — comfort that commands attention!

POSTURE PERFECT - Curved design promotes proper spine alignment and improves blood circulation to power through your workday.
STAY COOL FRESH - Breathable mesh cover with gel layer ensures superior airflow, keeping you comfortable and sweat-free.
EASY CARE LONG LASTING - Machine-washable cover and durable memory foam core maintain shape and freshness over time.
ERGONOMIC COMFORT BOOST - Extra-thick 4-inch memory foam cushions your tailbone and hips for all-day pain relief.
ANYWHERE ANYTIME SUPPORT - Portable design with carry handle and non-slip bottom—perfect for office, travel, or outdoor events.

The YOUFI Extra Thick Large Seat Cushion features a 19" x 17.5" x 4" gel-infused memory foam core designed to relieve pressure on the tailbone, hips, and lower back. Its breathable mesh cover promotes airflow to keep you cool, while the non-slip bottom and carry handle make it ideal for office chairs, wheelchairs, travel, and more. Engineered for pain relief and posture support, this durable cushion is machine washable and built to last, making it a must-have for professionals seeking comfort and productivity.

Specifications

ASIN	B08ZCXZGP8
Age Range Description	Adult
Best Sellers Rank	#195,018 in Home ( See Top 100 in Home ) #836 in Home Office Back Cushions & Seat Cushions
Brand Name	YOUFI
Coin Variety 1	Memory Foam,Seat Cushion
Color	Black
Customer Reviews	4.3 4.3 out of 5 stars (1,945)
Fabric Type	Mesh
Fill Material	Memory Foam
Item Dimensions L x W	48.3L x 44.5W centimeters
Item Weight	3.54 Pounds
Manufacturer	YOUFI
Material Type	Memory Foam
Model Name	Gel & Memory Foam Cushion
Model Number	NJLZD
Number of Pieces	1
Pattern	Solid
Product Care Instructions	Machine Wash
Recommended Uses For Product	Sitting
Shape	Rectangular
Size	19'' x 17.5'' x 4''
Special Features	Portable
Target Use Body Part	Back
Unit Count	1.0 Count

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