Mattress Sizes in Ireland — The Complete Guide | The Right Buy Store
by Himanshu Bhandar on Apr 19, 2026
Whether you're furnishing a child's first room, upgrading as a couple, or simply replacing a worn mattress, you'll find everything you need below. Browse our full mattress range when you're ready to buy — with free delivery in Northern Ireland and Ireland.
Standard Mattress Sizes in Ireland
Ireland follows the same sizing standards as the UK, measured in centimetres (cm). Here are the sizes we stock at The Right Buy Store:
| Size | Width (cm) | Length (cm) | Feet & Inches | Best For |
|---|---|---|---|---|
| Small Single | 75 | 190 | 2'6" × 6'3" | Box rooms, children |
| Single | 90 | 190 | 3'0" × 6'3" | Kids, teens, solo sleepers |
| Small Double | 120 | 190 | 4'0" × 6'3" | Solo adults, guest rooms |
| Double Most Popular | 135 | 190 | 4'6" × 6'3" | Couples, standard bedrooms |
| King Size | 150 | 200 | 5'0" × 6'6" | Couples, taller sleepers |
| Super King | 180 | 200 | 6'0" × 6'6" | Luxury master bedrooms |
Single
The classic choice for children, teenagers and solo adult sleepers.
Shop Single Beds →Small Double
15 cm wider than a Single — great for solo adults who want more stretch room.
Shop Small Double Beds →Double
Ireland's best-selling size. Comfortable for couples and single sleepers alike.
Shop Double Beds →King Size
Wider and longer than a Double — ideal for couples and taller sleepers over 6'2".
Shop King Beds →Super King
The ultimate sleeping space — 30 cm wider than a King, giving each partner room to breathe.
Shop Super King Beds →How Much Room Do You Need?
The mattress is only part of the equation — you also need comfortable walking space around the bed. Always aim for at least 60 cm on each side you access regularly. Here's a rough room size guide:
| Mattress Size | Minimum Room Size | Comfortable Room Size |
|---|---|---|
| Single | 2.0 m × 2.7 m | 2.4 m × 3.0 m |
| Small Double | 2.4 m × 2.8 m | 2.7 m × 3.0 m |
| Double | 2.6 m × 2.8 m | 2.9 m × 3.2 m |
| King Size | 2.9 m × 3.0 m | 3.2 m × 3.5 m |
| Super King | 3.2 m × 3.2 m | 3.6 m × 4.0 m |
Pro Tip: Always measure your doorways and staircase before ordering a large mattress. Super King mattresses can be tricky to manoeuvre through tight hallways — many come rolled in a box for easier delivery.
What About Queen Size in Ireland?
Queen size is not a standard mattress size in Ireland. It's a North American term for roughly 152 × 203 cm — falling between the Irish King and Super King in width. The closest Irish equivalent is the King Size at 150 × 200 cm. If you see a retailer listing a "Queen", always ask for the exact centimetre dimensions before buying.
Choosing the Right Size for You
👶 For Children & Teenagers
A Single (90 × 190 cm) is the standard recommendation — plenty of room to grow, fits most children's bedroom layouts, and works perfectly alongside a wardrobe or chest of drawers.
🧍 For Solo Adult Sleepers
A Double (135 × 190 cm) gives you freedom to spread out and is also an excellent guest bedroom option — comfortable for visiting couples too. A Small Double works if the room is tight.
👫 For Couples
A Double works in smaller rooms, but most couples sleep significantly better on a King Size (150 × 200 cm). That extra 15 cm of width makes a real difference when both partners are moving through the night. For couples who want maximum space — or who often have children or pets joining them — the Super King (180 × 200 cm) is transformative.
📏 For Taller Sleepers
If you're over 6'2" (188 cm), a King or Super King is worth considering for the extra length alone. Both measure 200 cm, giving you 12 cm of comfortable clearance. Standard Singles and Doubles are only 190 cm long, which can become an issue over time.
💡 Rule of thumb: Your mattress should be at least 10 cm longer than the tallest person sleeping on it. For width, lie down and tuck both hands behind your head — if your elbows touch the edge or your partner, size up.
Before You Buy — Measuring Checklist
5 Things to Check Before Ordering
- Measure your room floor area and compare against the room size guide above
- Account for other furniture — wardrobes, bedside lockers and chests of drawers all eat into floor space
- If replacing a mattress, measure the internal frame dimensions (inside the rails, not outside)
- Check doorways and staircase widths — particularly important for King and Super King sizes
- Think ahead — if you're moving or growing your family, it may be worth sizing up now
Remember: All mattress orders come with free delivery in Northern Ireland and Ireland — no surprise charges at checkout.
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