A gap between your mattress and headboard can swallow pillows, phones, glasses, and other bedtime essentials. A bed wedge pillow is designed to sit in that space, help keep items from slipping through, and give your regular pillow a steadier surface. The right choice depends on the size of your gap, the width of your bed, and whether you want extras such as side pockets or a washable cover.
Below, we compare five gap fillers with different fit ranges and designs. Check the measurements against your bed before choosing: a wedge that is too small may leave a gap, while one that is too large may not sit neatly in place.
Quick Comparison
| Product | Stated gap fit | Standout feature | Best for |
|---|---|---|---|
| Vekkia Queen Bed Wedge Pillow | 0–6 inches | Curved top and side pockets | A contoured surface for a more natural pillow position |
| Vekkia White Bed Wedge Pillow | 0–5.5 inches | Triangular shape and two pockets | Gap filling with some added head and neck support |
| Bedluxe King Bed Wedge Pillow | Product details differ: 0–6 or 0–7 inches | King-size option and 30D foam | A wider bed; confirm the fit range before ordering |
| Kölbs Queen Headboard Wedge | Gap-filling design; no range stated | Pockets with cable access holes | Keeping a device and charging cable close by |
| IFNOW Queen Bed Wedge Pillow | 0–8 inches | Wider base and memory foam | People with a wider gap to fill |
Our Picks: Best Pillow For Gap Between Mattress And Headboard reviews
Best Overall: Vekkia Queen Wedge with a Curved Top
The Vekkia queen wedge is made to fill a space of up to six inches between a mattress and headboard. Its curved top is designed to meet a regular pillow more smoothly than a flat-sided block, which may make it a good fit if you want to close the gap without creating an abrupt ridge behind your head.
It uses high-density foam and has pockets on the sides for small bedside items. The polyester cover unzips for machine washing. The wedge ships compressed, so plan to let it expand for 24–48 hours before judging its final shape.
This is a well-rounded option if your main goal is to stop pillows and small items from slipping behind the bed. Its curved profile is a useful design distinction from the more triangular Vekkia model below. The listed fit range is specific, though, so measure your gap first rather than assuming it will cover a larger space.
Pros:
- Designed for gaps from 0 to 6 inches
- Curved top is intended to align with a regular pillow
- Side pockets keep small items within reach
- Removable cover is machine washable
Cons:
- Needs time to fully expand after unpacking
- May not suit gaps wider than six inches
Verdict: Choose this Vekkia if you want a practical gap filler with a contoured top, washable cover, and useful storage pockets.
Best Triangular Design: Vekkia White Bed Wedge
This Vekkia wedge is designed for a gap of up to 5.5 inches. Its triangular shape is intended to fill the space at different angles, and the foam can also support a regular pillow. That added slope may appeal if you sometimes sit up to read or relax in bed, though it is still a gap filler rather than a substitute for a dedicated adjustable bed.
Two large pockets provide room for items such as a phone, glasses, or remote. The cover is removable and machine washable. The product is offered in different lengths, so check the selected size against your bed width when ordering.
Use notes suggest that the long form can also work in settings beyond a headboard gap, such as between a bed and wall. That flexibility is useful, but the stated gap range is narrower than the IFNOW option. If your space is close to the maximum, careful measuring matters.
Pros:
- Triangular shape can fill the gap at different angles
- Foam provides support for a regular pillow
- Two pockets offer bedside storage
- Removable, machine-washable cover
Cons:
- Stated gap range stops at 5.5 inches
- Available length and bed width should be checked before purchase
Verdict: Pick this model if you want a triangular wedge that fills a moderate gap and can also provide a little support while sitting up.
Best King-Size Option: Bedluxe Headboard Wedge
The Bedluxe is the king-size pick in this group. Its listed dimensions are 76 by 10 by 6 inches, and it has two side pockets for small items. The foam is described as 30D high-density sponge, intended to balance support with some softness and keep its shape with use.
There is a detail to verify before buying: the product title gives a gap range of 0–7 inches, while its feature description says it fills gaps from 0–6 inches. Because those details do not match, check the current product specifications and your own measurements rather than relying on the wider figure alone.
The polyester pongee cover is removable and machine washable. The wedge is also described for use on a sofa or tatami, which may suit someone who wants a versatile backrest. Its length makes it a natural option to consider for a king bed, but confirm that the stated dimensions match your mattress and headboard.
Pros:
- King-size length listed at 76 inches
- High-density foam is designed to retain its shape
- Two side pockets keep essentials nearby
- Removable cover is machine washable
Cons:
- Product details give conflicting maximum gap measurements
- Compressed packaging requires 24–48 hours for full expansion
Verdict: Consider Bedluxe for a king-size bed, but confirm the gap range and dimensions with the listing before you order.
Best for Charging Nearby: Kölbs Queen Headboard Wedge
The Kölbs wedge has listed queen-size dimensions of 60 by 10 by 6 inches. Its most distinctive feature is the pair of side pockets, each with an access hole for routing a charging wire to a device. That small detail can help keep a phone close without trapping the cable inside the pocket.
The foam wedge is designed to fit behind the mattress, and its polyester cover can be removed for machine washing. The supplied product information includes a one-year manufacturer warranty. Unlike several other choices here, it does not state a specific gap range, so the six-inch dimension should not be treated as a guaranteed fit for every gap up to that size.
This is a straightforward choice if cable access matters more to you than a stated gap-fit range or a specialty top shape. Measure the gap and check how the wedge will sit against your particular headboard before deciding.
Pros:
- Pocket access holes can route a charging cable
- Queen-size dimensions are listed as 60 by 10 by 6 inches
- Removable, machine-washable cover
- Product information includes a one-year manufacturer warranty
Cons:
- No specific mattress-to-headboard gap range is stated
- Only one listed size is described in the supplied product details
Verdict: Choose the Kölbs if you want a queen-length wedge with pockets designed to let charging cables pass through.
Best for a Wider Gap: IFNOW Queen Bed Wedge
IFNOW states that this wedge can fill gaps from 0 to 8 inches, the widest stated range among these five options. It is listed at 60 by 6 by 10 inches and has a wider base intended to help cover larger spaces. Measure carefully, since the fit also depends on how the wedge rests against your mattress and headboard.
The product uses high-density memory foam and has larger pockets on both sides for items such as a phone, remote, or glasses. Its cover unzips for machine washing. The listing says the compressed wedge may take four to five hours to expand after opening.
Some use notes describe the wedge as firm and helpful for keeping small items from falling behind the bed, while another suggests it may feel small for some expectations. That makes the listed measurements especially important: this model may cover a wide gap, but it is not a full-width backrest for every setup. It is offered in four sizes, according to the product description.
Pros:
- Stated fit range extends to 8 inches
- Wider base is designed for larger gaps
- Memory foam and side pockets add support and storage
- Removable cover is machine washable
Cons:
- Its firm feel may not suit people who want a soft cushion
- Check the selected size carefully, as the wedge may feel small for some setups
Verdict: IFNOW is the option to consider when your measured gap is wider than the ranges stated for the other models, provided its dimensions suit your bed.
How to Choose a Pillow for the Gap Between Your Mattress and Headboard
Measure the gap in more than one spot
Measure the distance between the mattress and headboard where the wedge will sit. Check across the bed, not just at the center, because the space may vary from one side to the other. Compare your measurements with the product’s stated fit range and physical dimensions. If the gap is wider than the listed maximum, a small wedge may not close it fully.
Match the length to your bed
A wedge should cover the part of the bed where pillows or small items tend to slip through. Check the listed length against your mattress width and consider whether you want coverage across the full bed or only behind one sleeping area. The products here include queen and king options, and some listings offer multiple sizes, so confirm the selected option before checkout.
Choose a shape that suits how you use your bed
A curved top is intended to meet a regular pillow more smoothly, while a triangular wedge may offer a more noticeable slope. If you mainly want to block the gap, focus on fit and stability. If you also sit up to read or relax, consider whether the wedge’s shape and height will feel useful for that purpose.
Consider foam feel and expansion time
Foam density and firmness affect how a wedge feels under a pillow and how well it holds its shape. Product descriptions may not make it easy to predict comfort, so think about whether you prefer a firmer support surface or a softer feel. Some models ship compressed; follow the maker’s expansion instructions and allow the stated time before deciding whether the shape is right for your bed.
Look at pockets and cable access
Side pockets can hold small essentials such as glasses, a remote, or a phone. If you plan to charge a device in a pocket, check whether the design has a cable access hole. Keep charging cables positioned safely and avoid placing a device where it could be uncomfortable or unsafe while you sleep.
Check cover care and warranty details
A removable, machine-washable cover is useful for routine cleaning. Confirm the care instructions for the exact model you choose, since the cover is not the same as the foam insert. If warranty coverage matters to you, review the product’s current terms before ordering; the supplied information lists a one-year manufacturer warranty for the Kölbs model.
Frequently Asked Questions
What is a bed wedge pillow for a headboard gap?
It is a long wedge-shaped cushion designed to sit between a mattress and headboard. It helps close the space where pillows and small items can slip through. Some models also have pockets for bedside essentials.
How do I know what size gap filler to buy?
Measure the gap and compare it with the stated range and dimensions for the exact size you plan to buy. Measure in several places across the bed if the gap is uneven. When a product description gives conflicting measurements, confirm the fit details before ordering.
Can I use a bed wedge pillow with any headboard?
These wedges are designed for use behind a mattress, but the fit depends on your bed setup, gap size, and headboard shape. Check the product dimensions and make sure there is room for the wedge to sit securely.
Do these wedges replace a regular pillow?
They are mainly made to fill the gap behind the mattress. Some designs can support a regular pillow or offer a slope for sitting up, but they are not necessarily a replacement for your usual sleeping pillow.
Are bed gap fillers machine washable?
The models in this comparison are described as having removable, machine-washable covers. That does not mean the foam insert can go in the washing machine. Remove the cover and follow the care instructions for the selected product.
How long should a compressed wedge take to expand?
Expansion time depends on the product. The supplied information says to allow 24–48 hours for the Vekkia and Bedluxe models, while the IFNOW description says four to five hours. Follow the instructions included with your wedge.
Which option is best for a gap wider than six inches?
The IFNOW model has the widest stated range in this comparison, at up to eight inches. The Bedluxe listing gives conflicting maximum measurements, so confirm its current fit details before considering it for a wider space.
Final Recommendation
For a typical gap of up to six inches, the Vekkia Queen Wedge is the most balanced choice, with a curved top, side pockets, and a washable cover. Choose the IFNOW if your measured gap is wider and its dimensions fit your bed. For a king-size setup, the Bedluxe is worth considering, but verify its conflicting gap specifications first. In every case, accurate measurements are the best way to avoid a poor fit.