Custom Without Chaos: The Simple Way to Request Alternate Sizes and Configurations

“Do you do custom sizes?”

It’s one of the most common questions we hear—because real rooms don’t always behave like standard mattress charts.

There are wall beds that need specific dimensions. RV platforms with tight corners. Historic homes with staircases that don’t love a rigid king. Guest rooms where a slightly different size makes the whole space work. Couples who want a split configuration without turning sleep into a debate.

Custom sizing can sound intimidating, but it usually isn’t.

At the House, we treat alternate sizes and configurations the way a design studio would: simple brief, clear measurements, calm execution.

One sentence we trust:

Custom doesn’t have to be complex—just precise.

Our HOH Innovation Centre is in Kelowna, British Columbia, where comfort decisions start. Our primary manufacturing is in the Greater Toronto Area, Ontario (Toronto). And our BESPOKE production—the halo expression of the House—is crafted in Calgary, Alberta and Toronto, Ontario.

This is the straightforward guide: what counts as an alternate size or configuration, what information we need, and how to request it without chaos.

Why alternate sizes exist (and why they’re more common than people think)

Standard sizes work for standard rooms. But modern homes (and many older ones) rarely stay standard.

Alternate sizes and configurations show up when you have:

• Murphy / wall beds (tight height and depth constraints)

• RV beds (shorter, narrower, corner-cut platforms)

• Daybeds and trundles (height and fit matter)

• Custom millwork platforms (built-to-measure bed bases)

• Historic homes (tight turns, narrow staircases)

• Split sleep setups (split king, split feel preferences)

• Hospitality installs (consistent fit across units)

One-line emphasis:

Most “custom” requests are simply “room reality” requests.

What we mean by “alternate sizes” vs “configurations”

These are different, and naming them correctly makes the process smoother.

Alternate size

The mattress is the same general style, but the dimensions change.

Examples:

• short queen

• RV king (varies by manufacturer)

• custom length for a built-in platform

• narrow width for a tight guest room

• a mattress trimmed to fit a wall bed cavity (within safe design limits)

Configuration

The dimensions may be standard or custom, but the layout changes.

Examples:

• split king (two pieces side by side)

• two twin XL units forming a king footprint

• a paired configuration for easier moving

• a setup designed for adjustable bases

• modular options for tight access homes

One-line emphasis:

Alternate size = dimensions. Configuration = layout.

The House approach: keep it calm, keep it clear

We don’t treat custom sizing like a boutique mystery.

We treat it like a design brief. That means:

• we start with the room constraints

• we confirm measurements in writing

• we align on the intended use (primary suite, guest room, RV, wall bed)

• we ensure the build remains coherent with the House Standard

• we avoid unnecessary complexity

Eco-forward choices remain a baseline expectation and are handled with care—no absolutes, just thoughtful selection. And we avoid making “custom” sound like a luxury performance. It’s often just practical.

The most common alternate size requests (and what to watch for)

Below are the requests we see most often, with the quiet details that prevent mistakes.

Murphy / wall bed mattresses

Wall beds are precise. The cavity size, hinge mechanics, and closing clearance matter.

What to watch for:

• exact inside cavity dimensions (not the frame’s outer dimensions)

• maximum mattress height allowed by the mechanism

• whether the bed closes with bedding on (many don’t)

• strap systems and how they compress the mattress

One-line emphasis:

Measure the cavity, not the room.

RV mattresses

RV bed platforms are famous for being “almost standard,” but not quite.

What to watch for:

• corner cuts (radius corners)

• tapered widths

• platform lips that reduce usable width

• access constraints for delivery and install

Daybeds, trundles, and compact frames

Height and fit are often the deciding factors.

What to watch for:

• guardrail height and safety

• max mattress height for trundle clearance

• slat spacing and foundation stability

Split configurations (split king / twin XL pairs)

Splits solve a real issue: movement, transport, and preference differences.

What to watch for:

• the seam feel (most people stop noticing quickly with the right setup)

• sheet strategy (split sheets vs one top sheet)

• foundation compatibility (especially adjustable bases)

The simple request process (what we need from you)

Custom becomes chaotic when people guess measurements. We prevent that by asking for a short set of inputs.

Step 1: Tell us the room and use

Choose one:

• Primary suite

• Guest room

• Kids room

• Wall bed / Murphy

• RV / camper

• Daybed / trundle

• Hospitality / multiple units

• Tight access home (stairs/turns)

Step 2: Provide the dimensions in one clear format

We recommend you send dimensions like this:

• Width: ___ inches

• Length: ___ inches

• Max height allowed: ___ inches (if applicable)

• Notes: corner cuts / taper / cavity lip / mechanism model

If it’s a wall bed, include:

• inside cavity width and length

• mechanism model (if known)

• whether it closes with bedding

One-line emphasis:

A single clean measurement message beats ten back-and-forth notes.

Step 3: Share a photo of the platform and label (if available)

A quick photo of:

• the platform

• the mechanism label (wall beds)

• the RV model info (if easy)

This helps prevent misunderstandings.

Step 4: Confirm whether you want one piece or a configuration

Do you want:

• one mattress

• split configuration (two pieces)

• paired units for easier moving

• compatibility with an adjustable base

Step 5: We confirm in writing before anything moves forward

This is where calm wins. We confirm:

• final dimensions

• configuration

• intended use notes

• any constraints we need to respect

This protects you—and protects the build.

What to consider

Custom sizing is straightforward, but there are a few practical considerations that matter.

1) Measurements need to be inside measurements

If you measure the outside of a frame, you may end up with a mattress that’s too big.

Always measure:

• inside edges

• cavity interior

• usable platform surface

2) Foundation stability still matters

A custom mattress won’t feel right on a base that flexes or has wide slat gaps.

If you’re building a platform, keep it stable and supportive.

3) Height is not just comfort—it’s function

In wall beds, trundles, bunks, and RVs, height can be a make-or-break detail.

4) “Cooling” and comfort are still system outcomes

Custom size doesn’t change the reality that sleep temperature depends on:

• bedding

• protectors

• airflow

• room temperature

We handle performance claims carefully because real rooms vary.

5) Know when custom becomes commissioning

If your request is more than size—if it’s about a specific feel, body needs, or couple mismatch—Haven Custom may be the right next step. If the brief is deeply personal and precise, BESPOKE is the halo expression of the House.

One-line emphasis:

Size is a fit problem. Feel is a design brief.

Common questions

1) What’s the most common custom mattress size request?

Wall beds and RV mattresses lead the list, followed closely by split configurations for easier moving and couple comfort.

2) How do I measure for a Murphy bed mattress?

Measure the inside cavity (usable interior width and length) and confirm the maximum mattress height your mechanism allows. If you can, include the mechanism model.

3) Can you do corner cuts or tapered RV mattresses?

Many RV platforms require specific shapes. The key is sending clear measurements and notes (and a photo helps). We confirm everything in writing before proceeding.

4) Is a split king the same as two twin XL mattresses?

Functionally, yes—two twin XL units side-by-side create a king footprint. It’s a common configuration choice for transport and adjustable base compatibility.

5) Will I feel the seam in a split configuration?

Some people notice it at first, most stop noticing quickly with the right bedding and setup. If seam sensitivity is a concern, we can guide the configuration choice.

6) Do custom sizes take more time or cost more?

Custom sizing often involves additional planning and confirmation steps. The best path is to submit clear measurements once so the process stays calm and efficient.

7) Where are House of Haven mattresses designed and made?

Comfort decisions start at the HOH Innovation Centre in Kelowna, BC. Primary manufacturing is in the Greater Toronto Area (Toronto). BESPOKE is crafted in Calgary and Toronto.

The House take

Alternate sizes and configurations shouldn’t feel like chaos. Most “custom” requests are simply the room telling the truth—wall beds, RVs, compact frames, tight access homes, and couples who want a split setup that makes life easier. The House approach is calm structure: clear measurements, clear intent, and a build that stays coherent with the House Standard. Custom isn’t complicated. It just needs to be precise.