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9/16 vs 3/4 Cellular Shades: Cell Sizes From 3/8 to 3/4 Explained
9/16 vs 3/4 Cellular Shades: Cell Sizes From 3/8 to 3/4 Explained
on Oct 28 2026
Quick Answer: In the 9/16 vs 3/4 cellular shades question, 9/16-inch cells are the all-round choice for standard windows roughly 24 to 72 inches wide, while 3/4-inch cells look better in proportion on wide windows, tall glass and patio doors and hold slightly more insulating air. Pick 3/8 or 1/2 inch for small or short windows. If insulation matters more than looks, moving from single cell to double cell makes a bigger difference than moving up one cell size.
Cell size is the height of each honeycomb pleat seen from the room, and it changes three things: how the shade looks at a distance, how tall the stack is when it is raised, and how much air each cell traps. This guide explains the common sizes, gives rules of thumb by window size and shows how to measure cells on a shade you already own. When you are ready to compare fabrics, browse our motorized cellular shades collection.
What Do Cellular Shade Cell Sizes Mean?
Cellular shades, also called honeycomb shades, are made from pleated fabric bonded into hollow cells. Each cell traps air, and the shade also traps a layer of air between itself and the glass. The U.S. Department of Energy notes that this is why well-fitted cellular shades reduce nighttime heat loss and cold drafts near windows[1].
The cell size or pleat size is measured on the face of the shade, from one crease to the next. Most residential honeycomb cellular shades come in five common sizes:
- 3/8 inch – very fine pleats, the slimmest look and the tightest stack.
- 7/16 and 1/2 inch – a little bolder, still suited to small and medium sized windows.
- 9/16 inch – the most popular size; balanced appearance on most windows.
- 3/4 inch – larger pleats that read clearly across a big room and suit wide openings.
Some manufacturers also quote a cell's depth (front to back) rather than its face height, so always check what a number refers to before you compare products. For example, our arched light filtering cellular shade lists a 1 3/4-inch single-cell honeycomb structure, which describes a different dimension than the 9/16 or 3/4 labels used by many retailers.
9/16 vs 3/4 Cellular Shades: What Is the Difference?
Both sizes perform the same basic job. The difference comes down to proportion, stack and a small change in insulation.
| Factor | 9/16-inch cells | 3/4-inch cells |
|---|---|---|
| Appearance | Tailored, finer lines; blends in | Bolder pleats; reads clearly from across the room |
| Best window size | Standard windows, about 24–72 in wide | Wide windows, tall glass and patio doors, often 72 in wide or more |
| Stack when raised | Compact on short and medium drops | Fewer pleats on tall drops, but each pleat is deeper |
| Insulation | Good; tighter air pockets | Slightly more trapped air per cell |
| Mounting depth | Usually easier to fit inside shallow frames | Can need a deeper frame or an outside mount |
| Best for | Bedrooms, offices, most living spaces | Great rooms, vaulted walls, sliding doors |
When 9/16-inch cells are the best option
9/16 is popular because it suits the widest range of windows. On a typical 36 x 60-inch bedroom or office window, the pleats look neat without feeling busy, and the stack stays modest when the shade is fully raised. If your home mixes small and medium windows and you want every shade to match, 9/16 is a safe default.
When 3/4-inch cells make sense
On large expanses of glass, small pleats can look like texture rather than a deliberate design. A 3/4-inch cell keeps the proportions right on windows over about 72 inches wide or on floor-to-ceiling glass. Larger cells also hold more air per pleat, which can modestly improve insulation. The trade-off is a slightly deeper profile, so check your window frame depth.
1/2 vs 3/4 Cellular Shades and Smaller Sizes
The 1/2 vs 3/4 cellular shades comparison usually comes up for homes with a mix of small and large windows. A 1/2-inch cell is a good fit for windows under about 36 inches wide, bathroom and laundry windows, and sidelights next to doors, where a 3/4-inch pleat would look oversized. The 3/8-inch size is the most discreet and works where the shade must almost disappear, such as narrow transoms.
How to Choose a Cell Size by Window Size
Use window size as your first filter, then adjust for mounting depth and how much the shade will be seen.
| Window width | Typical choice | Why |
|---|---|---|
| Under 24 in | 3/8 or 1/2 in | Keeps pleats in proportion to a small opening |
| 24–72 in | 9/16 in | Balanced look; the default for most homes |
| Over 72 in, or tall glass | 3/4 in | Bolder pleats suit large openings |
| Shallow frames | Smaller cells, or outside mount | Slimmer profile fits shallow recesses |
A simple rule: match cell size within a room, even if window widths vary. Mixed pleat sizes on the same wall are more noticeable than a slightly small or large pleat on one window.
How to Measure Cellular Shade Cell Size
If you are replacing an existing shade or matching shades in the next room, measure the cells before you order:
- Lower the shade fully so the pleats are open.
- Hold a tape measure vertically against the room side of the fabric.
- Measure from one crease to the next crease. That distance is the pleat size (for example, about 9/16 or 3/4 inch).
- For accuracy, measure across 10 pleats and divide by 10.
- Separately, measure the depth of the headrail front to back and compare it with the depth of your window frame.
Measuring the window itself is a different job. For width, height and mount type, follow our step-by-step cellular shade measuring guide before ordering.
Does Cell Size or Cell Count Matter More for Energy Efficiency?
Cell size helps, but construction matters more. A double cell shade stacks two layers of honeycomb pockets, and manufacturers describe this cell-within-a-cell design as the higher-efficiency option for homes with many windows or weather extremes. Adding that second layer of cells typically raises insulation more than moving from 9/16 to 3/4 inch in a single cell.
Fit matters too. In Department of Energy research, cellular shades saved up to 20% on heating energy and up to 15% on total heating and cooling energy compared with no shades, and the DOE stresses that well-fitted shades perform best[1]. To improve energy efficiency, prioritize a snug inside mount, the right cell construction and a schedule that closes shades on cold nights and sunny summer afternoons. Our article on how window shades reduce heating and cooling costs explains the science in more detail, and our guide to single vs double cell cellular shades compares the two constructions side by side.
Cell Size, Light Control and Privacy
Cell size does not decide opacity; the fabric does. Weffort cellular shades come in sheer, light filtering and blackout fabrics. Sheer and light filtering fabrics diffuse daylight and soften glare, while blackout fabric blocks nearly all incoming light for bedrooms and media rooms. For privacy at street level without losing daylight, consider top-down bottom-up operation; see our top down bottom up cellular shades guide.
How to Choose the Best Cellular Shade for Your Home
Work through these decisions in order:
- Window size: 3/8–1/2 inch for small windows, 9/16 inch for standard windows, 3/4 inch for wide or tall glass.
- Mounting depth: if the frame is shallow, choose a slimmer profile or an outside mount.
- Insulation goal: for cold rooms, drafty glass or hot west-facing windows, choose the motorized double cell light filtering cellular shades or the blackout double cell version.
- Light and privacy: light filtering for living areas, blackout for bedrooms and nurseries, top-down bottom-up for street-facing rooms.
- Control: Weffort cellular shades are cordless and motorized, with remote, wall switch, app or voice control and compatibility with Apple HomeKit, Google Home, Amazon Alexa and SmartThings. Learn how the pieces connect on our smart home systems page.
Cellular shades also fold rather than roll, which makes them practical for skylights and angled glass. If you have overhead windows, read our guide to motorized skylight shades.
Frequently Asked Questions
What is the most popular size of cellular shades?
9/16 inch is the most popular cell size because it looks balanced on most standard windows. It is fine enough for bedrooms and offices yet still clearly visible on larger living room windows.
How do I choose the cell size for cellular shades?
Start with window width: under 24 inches suits 3/8 or 1/2 inch, 24 to 72 inches suits 9/16 inch, and wider or taller glass suits 3/4 inch. Then check frame depth and keep one size per room for a consistent look.
How thick should cellular shades be?
Thickness depends on cell size and whether the shade is single or double cell. Double cell shades and larger cells have a deeper profile, so measure your frame depth; if it is shallower than the headrail, use an outside mount.
What size shade do I need for a 34-inch window?
For an inside mount, order the exact inside width you measure (for example, 34 inches) and let the factory make the small deduction for clearance. For an outside mount, add about 1.5 to 3 inches on each side so the shade overlaps the frame. A 1/2 or 9/16-inch cell suits a window this size.
Can you cut cellular shades to size?
Cutting cellular shades at home is not recommended, because the headrail, bottom rail and fabric must be trimmed evenly and motorized shades contain a motor and lift system. Custom shades made to your measurements fit better and block more light at the edges.
Does it matter if cellular shades are too long?
A shade that is too long will rest on the sill or stack loosely and can leave the fabric creased. Custom shades are made to your exact height, so measure in three places and use the shortest height for an inside mount.
Ready to compare pleats and fabrics in your own light? Order free fabric samples, then explore our full range of custom motorized cellular shades, made to order for your exact window size.