These are contoured so it is hard to answer your question. At the thickest point (the outside edge) they are approximately 1.5" thick. The top is concaved to accept the shape of your arm. They are firm but not hard. They are virtually identical to the original parts on my chair.

Office Chair Arm Rest Replacement Fits All Styles of Arms with 4" Mounting Hole Patterns Screws Set Desk Armrest Cover(2Pack)

Office Chair Arm Rest Replacement Fits All Styles of Arms with 4" Mounting Hole Patterns Screws Set Desk Armrest Cover(2Pack)

Q: Does anyone know if these will these fit the Lazy boy office chair sold at Costco?

The decryption provides the measurement of the recess for mounting. The spacing is such that the mount will be centered in the recess. The mounting screw holes are 4 inches apart. Hope this helps.

Q: my armrests did not come with screws - what size are the screws?

No idea, but could you use the screws for your original arm rests? Mine came with the screws.

Q: is this a universal size?

I don't know that it will fit every office chair, so I wouldn't say it's universal, but it's designed to fit the most common arm rests for office chairs.

Product ID: 115642307

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Details

Brand
Ketofa
Color
Black
Size
4" Mounting
Special Feature
Office Chair
Product Care Instructions
Wipe Clean

📏4" mounting hole fit

🔩Includes 4 screws set

🖤Durable PU material

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Office Chair Arm Rest Replacement Fits All Styles of Arms with Mounting Hole Patterns Screws Set Desk Armrest Cover(2Pack)

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Description

🪑 Upgrade your workspace comfort — don’t let worn-out arms hold you back!

SLEEK BLACK DESIGN - Professional matte black finish complements any modern office aesthetic.
COMPLETE INSTALLATION KIT - Includes 2 arm pads plus 4 screws for an effortless upgrade in minutes.
ERGONOMIC COMFORT DURABILITY - Premium PU material offers long-lasting support without cracking or wear.
PERFECT PAIR FOR BALANCED SUPPORT - Sold as left and right pads to ensure symmetrical arm comfort and style.
UNIVERSAL 4 MOUNTING HOLE COMPATIBILITY - Fits all office chair arms with precise 4" hole spacing for seamless replacement.

This 2-pack office chair armrest replacement set fits all chairs with 4" mounting hole patterns, featuring durable polyurethane pads and included screws for easy installation. Designed for ergonomic support and professional style, it’s the perfect upgrade to refresh your office chair’s comfort and appearance.

Specifications

Brand	Ketofa
Color	Black
Size	4" Mounting Hole
Special Feature	Office Chair Arm Rest
Product Care Instructions	Wipe Clean
Unit Count	2.0 Count
Recommended Uses For Product	Office
Maximum Weight Recommendation	250 Pounds
Pattern	Solid
Room Type	Office
Age Range (Description)	Adult
Included Components	Screw
Arm Style	With arms
Surface Recommendation	Hard Floor
Furniture base movement	Glide
Indoor/Outdoor Usage	Indoor
Fill Material	Polyurethane
Reclining Position Count	1
Tilting	No
Is Customizable	No
Is Foldable	No
UPC	727523250520
Form Factor	Double Pointed
Item Weight	1.57 pounds
Package Dimensions	10.98 x 4.84 x 3.9 inches
Item model number	10A0138
Is Discontinued By Manufacturer	No
Material Type	Polyurethane
Manufacturer Part Number	10A0138

Have a Question? See What Others Asked

Does anyone know if these will these fit the Lazy boy office chair sold at Costco?

my armrests did not come with screws - what size are the screws?

how thick are they

is this a universal size?

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