Choosing the best trim kit for an over-the-range microwave starts with measuring the gap—not just matching the finish. The options below include side filler panels designed to cover spaces beside a microwave, along with two stove-to-counter gap covers that are not suitable for microwave gaps. Check your microwave and cabinet dimensions carefully, and make sure any filler leaves the appliance’s required ventilation clearances unobstructed.
Quick Comparison
| Product | Best for | Key fit note |
|---|---|---|
| 8171339 Stainless Steel Microwave Filler Kit | Filling side gaps around a smaller microwave | Listed for a 30-inch microwave in a 36-inch cabinet, or a 36-inch microwave in a 42-inch cabinet; measure first. |
| Tatuo 3-Inch Stainless Steel Side Panels | A pair of side fillers for a wide cabinet opening | Each panel is listed at about 3 inches wide; confirm the height and depth against your installation. |
| IRENPORU Stainless Steel Microwave Trim Panels | Filling narrow side spaces with taller panels | Two panels are listed as 3 inches wide by 17 inches high; confirm appliance compatibility. |
| LIFFEE Adjustable Stove Gap Covers | Covering gaps between a stove and countertop | Not a microwave trim kit; intended for countertop and stove gaps. |
| Eveanro Stainless Steel Stove Gap Covers | Covering narrow stove-to-counter gaps | Not a microwave trim kit; intended for flat gaps beside a stove or similar surface. |
Our Picks: Best Trim Kit For Over The Range Microwave reviews
Best overall fit to consider: 8171339 Stainless Steel Microwave Filler Kit
This SHUJUKU filler kit is the closest match in this group to a purpose-made over-the-range microwave side-gap solution. It is described as a stainless steel kit for covering empty spaces around a microwave and is listed for installations such as a 30-inch microwave in a 36-inch cabinet. The package includes 16 screws.
The listed dimensions are 15.75 by 10.83 by 2.95 inches, so check how those measurements correspond to the panel orientation before ordering. The listing also names several microwave brands, but “universal” does not guarantee that the piece will suit every model or cabinet layout. Confirm the exact opening and the appliance’s installation instructions.
Some owners report a neat appearance and a proper fit, while others have encountered a finish that did not match the stainless steel description. Installation may also be difficult once the microwave is already in place. If you choose this kit, plan the work before installing or moving the appliance, and don’t cover vents or interfere with mounting.
Pros:
- Designed to fill gaps around an over-the-range microwave.
- Listed for common cabinet-opening size combinations.
- Stainless steel construction and mounting screws are included.
- Can create a more finished look when its dimensions match the opening.
Cons:
- Some units may not have the expected stainless steel finish.
- May be hard to install after the microwave is already mounted.
Verdict: Consider this first if your measurements match the listed size combinations, but inspect the finish and installation details before committing.
Best two-panel option: Tatuo 3-Inch Stainless Steel Side Panels
This set includes two stainless steel side panels and 16 screws. Each panel is described as about 15.75 inches high, 11 inches deep, and 3 inches wide. The listing suggests the panels can fill a three-inch gap on each side, including a 30-inch microwave installed in a 36-inch cabinet.
The panels are intended to cover exposed spaces and help keep crumbs and dust from collecting beside the appliance. Some owners say the panels made a smaller replacement microwave look more at home in a wider opening. Others have found the material or finish less substantial than expected, so don’t assume it will match every stainless appliance exactly.
The panels can reportedly be bent by hand to help secure them, but that also means careful handling matters. If your microwave is already installed, fastening the panels with the included screws may not be practical. Any alternate attachment method should hold them securely without blocking airflow or changing the appliance’s required clearances.
Pros:
- Includes two panels for filling gaps on both sides.
- Three-inch width may suit common cabinet-width differences.
- Includes mounting screws.
- Some owners find it a tidy, lower-cost alternative to a brand-specific filler.
Cons:
- Finish and material quality may not match every microwave.
- Measure the full panel dimensions; width alone is not enough to confirm fit.
Verdict: This is a practical option when you need two roughly three-inch side fillers and have verified the panel height, depth, finish, and installation method.
Best taller side panels: IRENPORU Stainless Steel Microwave Trim Panels
IRENPORU’s set contains two stainless steel filler panels, each listed as 3 inches wide by 17 inches high, with screws included. The product description says the panels are meant to cover gaps beside countertop or over-the-range microwaves. Its taller profile may suit an installation where shorter panels would leave part of the side opening exposed.
The listing describes a brushed finish and pre-drilled holes for mounting. Those details may help with a cleaner appearance and a simpler setup, but the product dimensions still need to match your actual cabinet and microwave. The supplied information does not establish compatibility with specific microwave models, so treat the broad fit claim as a starting point rather than a guarantee.
This option is best viewed as a pair of side filler strips, not a complete microwave trim frame. Check that the panels can be secured to an appropriate surface and that they do not obstruct ventilation or access to the microwave. It may be worth comparing the panel depth and finish with the Tatuo set before choosing.
Pros:
- Two panels are included for the left and right sides.
- Listed 17-inch height may cover a taller gap.
- Pre-drilled holes and screws are included.
- Brushed stainless steel finish is described as easy to maintain.
Cons:
- Specific model-by-model compatibility is not provided.
- Dimensions and finish should be checked against your installation before purchase.
Verdict: Choose these panels only if their 3-by-17-inch size suits your opening and you can confirm a safe, secure installation.
Not for microwave gaps: LIFFEE Adjustable Stove Gap Covers
This product is a set of adjustable covers for the narrow gaps between a stove and countertop. It is not a trim kit for the sides of an over-the-range microwave. The covers are listed as adjustable from 13.8 to 27.5 inches long and are meant for a gap width between about 0.31 and 1.18 inches on a suitable, level surface.
The stainless steel pieces are designed to catch crumbs and spills beside a range. Their T-shaped form and adjustable length are useful for that specific job, but they do not provide the tall, vertical coverage needed to fill a cabinet opening around a microwave. Use them only for the intended stove-to-counter application.
Pros:
- Adjustable length for a range of stove-side gaps.
- Stainless steel construction is described as heat resistant.
- Designed to be removed for cleaning.
Cons:
- Not designed to fill gaps around a microwave.
- Not suitable for uneven surfaces or gaps outside the listed range.
Verdict: Skip this for a microwave installation; consider it only if you also need a stove-to-counter gap cover that matches its fit requirements.
Not for microwave gaps: Eveanro Stainless Steel Stove Gap Covers
Like the LIFFEE option, this Eveanro set is made for gaps between a stove and countertop, not the side spaces around an over-the-range microwave. The two covers extend from 13.8 to 27.5 inches and are intended for narrow gaps on flat surfaces. The listing also describes a stainless steel finish and removable, easy-to-clean construction.
Owners of this style of cover may appreciate the adjustable length and the ability to wipe away debris, but those features do not make it suitable for microwave cabinetry. Its shape and purpose are different from vertical filler panels. If you are shopping for a microwave, focus on products specifically sized for the cabinet opening and appliance.
Pros:
- Adjustable length for compatible stove-side gaps.
- Stainless steel construction and a brushed finish.
- Designed to be removed and cleaned.
Cons:
- Not a microwave trim kit or vertical cabinet filler.
- Requires a flat surface and a gap within its stated size range.
Verdict: This is a stove accessory, not a solution for a microwave cabinet gap, so choose one of the vertical panel options for your microwave instead.
How to Choose a Trim Kit for an Over-the-Range Microwave
Measure the opening and the exposed gaps
Measure the cabinet opening, the microwave’s width and height, and the gap on each side. Also check the depth and height of any panel you are considering. A product that is the right width may still be too short, too deep, or difficult to secure. Compare measurements with the product listing, and confirm how its stated dimensions are oriented.
Confirm that the product is made for microwave side gaps
“Gap cover” can describe very different accessories. Vertical side filler panels are intended to cover space beside an appliance. Stove gap covers sit horizontally between a range and a countertop. The two stove products in this guide are not suitable replacements for microwave trim panels, even though their names include terms like “gap cover” or “trim.”
Check your microwave’s installation instructions
Over-the-range microwaves need to be installed according to the manufacturer’s instructions. Before adding a filler, confirm the required clearances and ventilation areas for your model. Do not cover vents, change mounting points, or use a trim piece in a way that interferes with safe installation. If the accessory’s placement is unclear, ask the manufacturer or a qualified installer.
Look at the finish and material details
Stainless steel finishes can vary in color, sheen, and texture. A brushed panel may not match a polished appliance, and product descriptions do not guarantee an exact match to your microwave. If appearance matters, compare the finish closely and check the item when it arrives before installing it.
Plan how the panels will attach
Some panels come with screws and pre-drilled holes, but your cabinet or appliance may not offer a suitable place to use them. Consider access to the mounting area before the microwave is installed. Do not rely on an attachment method that leaves a panel loose or puts stress on the appliance.
Choose a complete trim kit when your installation calls for one
Side filler strips only cover specific gaps; they are not necessarily a full trim frame or a substitute for a model-specific accessory. If your microwave installation requires a complete built-in trim kit, check the appliance model number and use a kit listed for that exact model and installation type. The products in this comparison are primarily gap-filling panels, not universal replacements for every microwave trim system.
Frequently Asked Questions
Can I use any microwave trim kit with an over-the-range microwave?
No. Compatibility depends on the microwave model, cabinet opening, panel dimensions, and installation design. Check the appliance manual and the accessory’s specifications before buying.
Are side filler panels the same as a built-in microwave trim kit?
Not always. Side filler panels cover exposed gaps beside an appliance. A built-in trim kit may be a model-specific frame designed for a different type of installation. Confirm that the accessory matches your microwave’s intended installation.
How do I know what size filler panels I need?
Measure the opening and the gap on both sides, then compare those measurements with each panel’s width, height, and depth. Do not rely only on a product’s suggested cabinet-width combination.
Can I install the panels after the microwave is mounted?
It may be difficult, especially if the panels need screws in areas that are no longer accessible. Plan the installation in advance and follow the microwave manufacturer’s instructions. Avoid moving or altering a mounted appliance unless you can do so safely.
Will stainless steel filler panels match my microwave?
Not necessarily. Stainless finishes can differ in tone and sheen, and the supplied product information does not guarantee an exact match. Compare the finish description and inspect the panel before installation.
Can stove gap covers fill the space beside my microwave?
No. The LIFFEE and Eveanro products listed here are designed for gaps between a stove and countertop. They are not tall side panels for a microwave cabinet opening.
Final Recommendation
For an over-the-range microwave, start by checking the 8171339 filler kit if your cabinet and microwave dimensions match its listed use. The Tatuo two-panel set is another option for roughly three-inch side gaps, while the taller IRENPORU panels may suit openings that need more vertical coverage. In every case, confirm fit, finish, attachment, and ventilation requirements before installation. The LIFFEE and Eveanro items are stove gap covers and should not be used as microwave trim kits.
