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STARY 21.5-inch Blue-Light Screen Protector, 2 Pack1 / 7
Product guide

STARY 21.5-inch Blue-Light Screen Protector, 2 Pack

The STARY blue-light screen protector is a two-pack sized for 21.5-inch widescreen desktop monitors. Its reversible matte and glossy sides let you choose between the listing’s glare-reducing matte finish and clearer glossy view, while the supplied dimensions make measuring your display important before ordering.

At a glance

  • Reversible design offers a matte side for less glare or a glossy side for a clearer view, according to the listing.
  • The listing gives two fitting options: adhesive strips or removable slide-mount tabs.
  • The stated screen-filter dimensions are 476 mm wide by 268 mm high, for a 21.5-inch 16:9 widescreen monitor.
Price
£28.89Save 15%

Reference price: £33.99

Price checked: 12 Nov 2026

View offer

Often bought together

Pros and cons

Pros

  • Two protectors are listed, with two installation kits also specified in the package contents.
  • Matte and glossy viewing options make it possible to choose between reduced glare and a clearer-looking screen.
  • Customer feedback describes installation as easy and reports a good fit.

Cons

  • The matte side is described as reducing glare, but customer feedback is mixed on its effect on clarity and light.

Technical specifications

12 specifications
Identity
BrandSTARY
Display and compatibility
Screen size21.5 Inches
Compatible devicesDesktop
Part numberMonitor 21.5 inch 16:9
Dimensions and installation
Dimensions listed47.6L x 26.8W centimetres
Materials and protection
Material listedPolyethylene Terephthalate
Item hardness9H
Special features9 H Surface Hardness, Anti Glare, Anti-Bubble, Blue Light Block, High Definition Clarity
Finish typeMatte & Glossy
Clarity96
Quantity and origin
Number of items2
Country of originChina

What to know before buying

  • Confirm your monitor's actual viewing-area width and height before buying. The listing says the filter is not for iMac and advises checking dimensions, even when the screen is described as 21.5-inch 16:9. The 96 clarity figure and claims of up to 98% blue-light and up to 99% UV filtering are manufacturer claims, not independent measurements.

What’s in the box

Included
  • Screen
  • Cleaning cloth x1
  • Installation kits x2
  • User manual

Who is it for?

A good fit for

  • Owners of desktop monitors whose screen measures 476 mm by 268 mm and who want a reversible filter.
  • Buyers wanting two protectors and a choice of adhesive-strip or removable tab installation.

Less suited to

  • iMac owners, which the listing specifically excludes.
  • Anyone prioritising an unobstructed screen without a filter, or whose monitor dimensions do not match the stated size.
STARY 21.5-inch Blue-Light Screen Protector, 2 Pack · photo 2
Additional product photo 2

Customer reviews on Amazon

4.2 / 5 · 243 ratings
  • 5 stars68%68%
  • 4 stars10%10%
  • 3 stars7%7%
  • 2 stars4%4%
  • 1 star11%11%

Customer feedback highlights easy installation and a good fit. Opinions on anti-glare performance are mixed, including reports of reduced glare and fingerprints as well as concerns about clarity and light. Feedback also describes value as mixed. These experiences matter because the filter offers a matte side intended to reduce glare, but the practical viewing result may not suit everyone. The overall rating is positive but includes a notable spread of lower ratings, which does not reveal their causes.

Positive themes

  • Customers describe installation as easy.
  • Customers report that the protector fits the screen well.

Mixed feedback

  • Customer feedback on anti-glare performance is mixed, including contrasting views on glare reduction and clarity.
  • Feedback on value for money is mixed.

Frequently asked questions

Will this fit any 21.5-inch monitor?

Not necessarily. The listing specifies a 21.5-inch widescreen 16:9 display and dimensions of 476 mm by 268 mm. Measure the screen before ordering. It also says the protector is not for iMac.

Can I choose between matte and glossy?

Yes. The listing describes it as reversible. It says the matte side reduces glare, while the glossy side gives a clearer screen.

How can it be attached?

The listing describes clear adhesive strips or removable slide-mount tabs attached to the display frame.

What is included?

The listed contents are two 21.5-inch blue-light screen protectors, one cleaning cloth, two installation kits and one user manual.

STARY 21.5-inch Blue-Light Screen Protector, 2 Pack · photo 3
Additional product photo 3

Alternative options

Product details in Markdown