GDLF Winter Cat Window Box – Cat Window Perch Catio with Windproof Cover & Door, Fits 24.3–38.8" Openings (Min Height 16")

Window Cat Perch Catio, Wood Cat Window Box, Window Catio for Indoor Cats. Suitable Single Hanging Window with an Inner Diameter of The Window Frame with A Net Opening Width of 24-35 in（White）

Grepatio Cat Catio 4 Tiers Outdoor Cat Enclosure Window Access, Indoor Cat House with Wheels and Removable Floor, Outside Large Cat Cage with Waterproof Roof, Kitty Cattio with Resting Box (Black)

Outdoor Cat Window Box, 43.3x25.2x47.2 inches Perch, Wooden Catio with Mesh Windows, Holds up to 55 lbs Cat

DIY 2x4 Ft Window Catio Plans, Outdoor Cat Enclosure for Fresh Air and Safety, Secure Cat Window Seat, Weather-resistant & Ventilated Design - Etsy

Cat Catio,Window Box Enclosure,Cat Window Perch Large,Universal Wooden Small Pet Perch Wooden Window House,All-Weather Use Safely and Enjoying Air

Window Catio Plans | MyOutdoorPlans

21 Best DIY Cat Enclosure Plans and Ideas | DIY Catio Ideas

5 DIY cat window box plans you can try at home