First, you’ll pick between inside mount (flush in your frame) or outside mount (on the wall around it). Then measure at three points—left, center, right for height; top, center, bottom for width—and use the longest height and narrowest width for inside mounts. Finally, jot down those numbers, snap a photo, and you’re ready to order. There are additional details that will help make this process smoother.
Step 1: Decide Between Inside or Outside Mount Blinds
Before you even think about measuring, you’ve got to make a choice: are your blinds going inside or outside the window frame?
Here’s the deal: an inside mount sits right within your window frame, giving you a clean, flush look—but it requires at least ¾ inch of window depth to work. Want a sleek appearance? You’ll need a bit over 2 inches. An outside mount, meanwhile, doesn’t care about depth requirements whatsoever. It mounts on the wall around your frame, offering way more flexibility. Plus, you can extend it 2–3 inches beyond the frame on both sides for maximum coverage.
Your choice affects everything: how you’ll install them and how much of that window frame stays visible. Pick what works best for your space.
Cordless Blinds: Filter out light with the Achim Cordless Light Filtering Mini Blinds. These lightweight, vinyl blinds with no cords to get tangled are child and pet safe. Durable, high quality construction resists warping, fading, and sagging.
【Excellent Material】：Blind Size: 23"W x 72"H, Fabric Size: 22"W x 72"H. Fabric is 100% polyester material fabrics with reinforce thermal insulated coating, feeling soft and smooth. No burrs, strong wear resistance, and easy to clean.Our blackout blinds block 100% of sunlight and UV rays. The thermal backing reduces the loss of room heat and against cold through the windows in winter and summer, helping to reduce your energy bills.
Step 2: Measure Windows for Inside or Outside Mount Blinds
Now that you’ve decided where your blinds are going, it’s time to break out the measuring tape—and this part requires precision. For inside mount measurements, use three points (left, center, right) and pick the largest measurement for length, then measure width at three spots (top, center, bottom) and use the smallest number, rounding to the nearest eighth inch. Outside mount is more straightforward—no depth requirements here—so focus on extending the blinds two to three inches beyond your window frame on both sides for proper coverage. The key difference? Inside mount needs that snug fit, while outside mount gives you flexibility and a clean look that frames your windows well.
[Free-Stop System]:Our blackout roller blinds feature the Free-Stop System, allowing you to adjust the blinds to any height with a gentle pull. Achieve precise control of light and privacy effortlessly, without the need for traditional ropes or chains. The system operates quietly and is safer for homes with children and pets.
Cordless Blinds: Filter out light with the Achim Cordless Light Filtering Mini Blinds. These lightweight, vinyl blinds with no cords to get tangled are child and pet safe. Durable, high quality construction resists warping, fading, and sagging.
【Excellent Material】：Blind Size: 23"W x 72"H, Fabric Size: 22"W x 72"H. Fabric is 100% polyester material fabrics with reinforce thermal insulated coating, feeling soft and smooth. No burrs, strong wear resistance, and easy to clean.Our blackout blinds block 100% of sunlight and UV rays. The thermal backing reduces the loss of room heat and against cold through the windows in winter and summer, helping to reduce your energy bills.
Step 3: Document Your Measurements and Order Your Blinds
Once you’ve got those three measurements written down—and you’ll need them in about five minutes—it’s time to organize everything and actually place your order. I like to snap a photo of my notes for reference. When you’re ready to order blinds, double-check which measurement you’re using: for an inside mount, use that longest height and narrowest width you recorded. Verify your mount type one more time—this matters—because ordering the wrong size is frustrating. Most retailers make this simple; you’ll just input your measurement, select inside mount, and you’re done. You’ll have blinds that fit properly.
IMPORTANT SIZING INFORMATION! - This window blind is 33.5" wide to allow for mounting inside a 34" wide window opening. All inside-mount blinds include a ½-inch width deduction from the size ordered to ensure a perfect fit within your window frame. Your blind will arrive exactly 33.5" wide (for a 34" wide window). Sizes listed in the product description are measured by Width × Height. Please review our measuring guide to confirm proper sizing before ordering.
Excellent Fabric：KALYSIE cordless roller shades made of 100% polyester fabric with thermal insulated coating, block 100% sunlight and UV rays. Protect your privacy and reduce noise, give you a good sleep in night.
Motorized Cellular Shades with Remote: Smart cellular blinds can regulate the incoming natural daylight and sunlight to control the indoor climate and save energy, by taking full advantage of the reflective and insulating properties, creating perfect atmosphere at any time of the day.
