Bed Bridge Sizing Guide: Which Setup Actually Fits
No gap to measure, no size chart to decode. Here is exactly which mattress combinations a horizontal bed bridge works with, in real inches.
Shop the Bedbinder DeluxeDoes a bed bridge fit your mattresses?
A horizontal bed bridge, like the Bedbinder Deluxe, fits two Twin or two Twin XL mattresses side by side, each 31 to 47 inches wide and up to 80 inches long. That covers a twin-to-king setup and a split king bed.
It does not connect two Full, Queen, or King mattresses, since those sizes are almost never sold or used in pairs. If your bed is a single mattress with a headboard gap, see the headboard gap guide (Dutch page) instead.
Mattress combinations, checked against real dimensions
| Setup | Mattress width (each) | Combined width | Fits the Bedbinder Deluxe |
|---|---|---|---|
| Two Twin (38″ × 75″) | 38″ | 76″ | Yes |
| Two Twin XL (38″ × 80″), split king | 38″ | 76″ | Yes, adjustable frame or static |
| Twin + Twin XL (mismatched pair) | 38″ each | 76″ | Yes, up to 1.2″ height difference |
| Two Full (54″ × 75″) | 54″ | 108″ | No, wider than the strap range |
| Two Queen (60″ × 80″) | 60″ | 120″ | No, uncommon pairing regardless |
The Bedbinder Deluxe strap spans 102 inches (260 cm), long enough to wrap under two 80-inch Twin XL mattresses with slack to spare. Width is not the limiting factor here, the mattress-width range is.
Why gap width doesn't matter here
Foam wedges are sold by gap width, typically 1.5 to 3 inches, because a wedge has to be shaped to fill the specific space between your mattresses. Measure wrong and it either won't fit or leaves a visible sliver.
A horizontal bed bridge works differently. It doesn't fill the gap, it removes it. The straps pull both mattresses together until they touch, so the same one-size Bedbinder Deluxe works whether your gap started at half an inch or three inches wide.
One universal size, no gap measurement needed. See the full horizontal vs vertical comparison for how the two approaches actually differ.
The Bedbinder Deluxe, in numbers
| Strap length | 102 inches (260 cm), Extra Strong, 3 buckles |
|---|---|
| Fits mattress width | 31 to 47 inches (80 to 120 cm) per mattress |
| Height tolerance | Up to 1.2 inches (3 cm) difference between the two mattresses |
| Material | Bedding-grade polyester, industrial plastic buckles |
| Mattress types | Foam, pocket spring, latex, hybrid |
| Bed types | Boxspring, platform bed, adjustable electric bed |
| Installation | Under 3 minutes, no tools needed |
Frequently asked questions about sizing
What size mattresses does the Bedbinder Deluxe fit?
It fits two Twin or two Twin XL mattresses, each 31 to 47 inches wide and up to 80 inches long. That covers a twin-to-king setup and a split king. It does not join two Full, Queen, or King mattresses, since those are not typically sold in pairs.
How do I measure the gap between my mattresses?
You don't need to. A horizontal bed bridge pulls both mattresses together until the gap closes to zero, so it works the same whether your gap is half an inch or three inches wide. Gap-width measuring only matters for a foam wedge, which is sized to fill a specific gap.
Does the Bedbinder Deluxe work if my mattresses are different heights?
Yes, up to about 1.2 inches (3 cm) difference. The strap system flexes to that difference and still pulls both mattresses tight against each other.
What is the difference between a split king and twin-to-king setup?
Both use two Twin XL mattresses side by side. A split king sits on an adjustable frame with two independent motors, so each side moves on its own. A twin-to-king setup sits on a normal static frame. The same Bedbinder Deluxe fits both, since it connects the mattresses either way.
One size, no gap math required
If your setup is two Twin or Twin XL mattresses, the Bedbinder Deluxe fits. No measuring, no guessing.
Order the Bedbinder Deluxe30-night trial. Not happy? Full refund, no questions asked.