Arch or half-circle windows add architectural charm but can present light control challenges. The following arch window blackout shades are designed to fit semicircular and half-moon openings, offering easy installation, privacy, and energy savings. This guide highlights five standout options with features tailored for curved window shapes, so you can pick the best fit for your space.
style=”display:none”>Summary Table of Selected Products
| Product | Brand | Window Size (Approx) | Key Benefit |
|---|---|---|---|
| Arch Window Shades Half Circle Blackout (White, 72″ W x 36″ H) | MYshade | 72″ W x 36″ H | Durable blackout fabric with easy tool-free install |
| Arch Window Shade Blackout White (72″ x 36″) | HOMEDEMO | 72″ W x 36″ H | No-drill installation with Velcro and accessories |
| Arch Window Shades Blackout Half Moon (Radius 36″) | Changshade | Radius 36″ window | Customizable fit; easy cut and install |
| Arch Window Shade Blackout (Half Circle, 36″ x 18″) | Maritown | 36″ W x 18″ H | Multiple sizes and colors; no-drill installation |
| Arch Window Shade No Tools Original (72″ W x 36″ H) | Redi Shade | 72″ W x 36″ H | Trim at home; tool-free peel-and-stick |
MYshade Half Circle Arch Window Shade

The MYshade arch honeycomb blackout shade is crafted from durable non-woven fabric to deliver long-lasting performance and easy upkeep. A laminated aluminium foil backing ensures complete blackout and privacy. Designed for half-round windows with a 36″ radius, it fits arched openings ranging from 6″ to 36″. It can be trimmed for an exact fit on irregular arches. The package includes accessories that help prevent tilting or falling, and sturdy double-sided tape supports a tool-free installation.
HOMEDEMO Arch Window Shade Blackout White

HOMEDEMO offers a no-drill installation approach with easy-clean Velcro and full detachment for cleaning. The shade uses fade-resistant polyester with a reflective aluminum foil layer for 100% blackout, enhanced insulation, and reduced noise. The kit includes 2 strong adhesive Velcro strips, a support bracket, a measuring tape, and 2 clips. It is designed for quick, tool-free setup on arched windows, making it a practical option for renters or DIY enthusiasts.
Changshade Arch Window Shade Radius 36

Changshade’s arch cellular shade uses a durable non-woven fabric with a laminated aluminum foil backing to guarantee complete blackout and privacy. The design targets half-moon and half-circle windows with a 36″ radius, suitable for arches from 6″ to 36″. It ships with accessories to prevent tilting or falling and features strong double-sided tape for simple tool-free installation. The shade can be trimmed for a precise fit on irregularly shaped windows, offering flexibility in arch applications.
Maritown Arch Window Shade 36×18

Maritown’s arch blackout shade is offered in multiple sizes and colors, with a focus on ease of installation. The shade uses a thick non-woven fabric with a built-in silver coating for effective light and heat blocking on both sides, ensuring uniform appearance. It includes a honeycomb design with a fixed arched bracket to stabilize the shade, plus strong double-sided tape for a tool-free, no-drill installation. Available options cover common arch dimensions to suit different rooms and styles.
Redi Shade Arch No Tools Original

Redi Shade’s original arch light-blocking pleated fabric shade is designed for easy at-home trimming to fit half-round arch windows. The trim-and-stick installation requires no drills, screws, or brackets. The fabric features a light-blocking, heat-reflective layer to balance privacy with daylight control. For irregular arches, this shade provides a simple, flexible option without specialized hardware.
MYshade Arch Window Shade 48×24

The smaller MYshade option maintains the same core features—durable non-woven fabric, aluminium foil backing for blackout, and a 24″ radius for arch compatibility. It can be trimmed to fit irregular arches and includes accessories to prevent tilting or falling. As with the larger MYshade shade, it relies on double-sided tape for straightforward installation without tools, suited for a variety of semicircular window installations.
Changshade Arch Window Shade Radius 24″

Changshade’s 24″ radius arch shade is crafted for durability with a non-woven fabric and a laminated aluminum foil backing to deliver blackout and privacy. It’s designed specifically for half-moon and half-circle windows with a 24″ radius and fits arches from 6″ to 24″. The set includes accessories and strong double-sided tape for tool-free installation, making it a versatile choice for smaller semi-circular openings and a clean, uniform look across rooms.
Buying Guide: Key Considerations When Choosing Arch Window Blackout Shades
- Fit and sizing: Arch window shades are typically sized by radius and width. Measure the inner arc radius and window width to ensure a snug fit. Some products support trimming for irregular arches; others require precise dimensions.
- Light control and blackout performance: Look for a laminated backing (often aluminum foil) and dark color options to maximize light blockage and privacy. Honeycomb and pleated constructions offer different insulation and light diffusion effects.
- Installation approach: Tool-free options with double-sided tape or Velcro are ideal for rentals or quick upgrades. If you prefer a permanent, wall-mounted install, verify whether screws or brackets are included or required.
- Durability and maintenance: Non-woven fabrics resist wear and are easy to clean, but check whether the shade is washable or needs spot cleaning. Some designs include detachment features for easier cleaning.
- Versatility and color options: From white to beige and other neutrals, color choices affect room ambiance. Consider whether a two-sided shade with a different back color is desirable for aesthetics from outside or behind the curtain.
- Energy efficiency: Blackout shades reduce heat gain and improve insulation. For arched windows, ensure the shade’s sides seal adequately around the arc to minimize drafts and leaks.
- Warranty and support: Review product warranties and available support for sizing adjustments, especially for irregular arches where trimming may be needed.
When selecting an arch window blackout shade, prioritize fit to the arc, ease of installation, and the level of blackout you require. The options above offer varying approaches—from no-drill Velcro systems to trim-at-home pleated designs—so you can balance convenience with performance. For rental spaces, tool-free installs with removable tape or Velcro can preserve window frames while still delivering privacy and energy savings. For long-term homeowners, a trim-ready or customizable fit may ensure a tighter seal and better lighting control.