Heavy duty
Brooklyn BeddingTitan Plus Luxe
- Hybrid
- 13 in thick
- Plush
$1,665Short Queen - 60x75 · 1 in shorter than your platformSee price
Grand Design Imagine 18BH mattress size
Main bed60 × 76 inCustom size
RV mattress sellers stock this exact size, or order a custom size cut to your platform.
Grand Design spec sheet, 2025.
Bunks32 × 72 in
Bunk. Grand Design spec sheet, 2025.
Common RV bunk sizes →
Mattresses in 60 × 76 in
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Natural latex
PlushBedsEco Green Organic Latex
- Latex
- 8 in thick
$1,175Queen Short (60 × 75) · 1 in shorter than your platformSee price
Custom size
Mattress InsiderLuxury Gel Memory Foam
- Memory foam
- 8 in thick
- not stated
Made to 60 × 76 inGet a quote
Bunk mattresses in 32 × 72 in
Some bunks have a rounded corner, so trace yours before a custom cut. A thicker bunk mattress takes headroom from the bunk above.
Custom size
Mattress InsiderLuxury Gel Memory Foam
- Memory foam
- 8 in thick
- not stated
Made to 32 × 72 inGet a quote
The Imagine bedroom. Measure the platform, not the old mattress, before you buy.
Bed sizes by year
| Year | Main bed | Bunks | Other beds | Source |
|---|---|---|---|---|
| 2023 | – | 32 × 72 in | – | Dealer report |
| 2023 | 60 × 76 in | 32 × 72 in | – | Grand Design spec sheet |
| 2024 | 60 × 76 in | 32 × 72 in | – | Grand Design spec sheet |
| 2025 | 60 × 76 in | 32 × 72 in | – | Grand Design spec sheet |
Years not listed weren't published.
The 18BH floorplan
Grand Design's 2025 18BH floorplan.
Is this your 18BH?
Check the year and length against your RV before you order.
| Year | Model | Length | Sleeps |
|---|---|---|---|
| 2023 | Imagine AIM 18BH | 21' 11" | 4 |
| 2024 | Imagine AIM 18BH | 21' 11" | 4 |
| 2025 | Imagine AIM 18BH | 21' 11" | 4 |
Other Imagine mattress sizes
Sources
- Grand Design (granddesignrv.com), archived copy: https://web.archive.org/web/20230520085319/https://www.granddesignrv.com/travel-trailers/imagine-aim/18BH
- Grand Design (granddesignrv.com), archived copy: https://web.archive.org/web/20231210140607/https://www.granddesignrv.com/travel-trailers/imagine-aim/18bh
- Grand Design (granddesignrv.com), archived copy: https://web.archive.org/web/20251009082403/https://www.granddesignrv.com/travel-trailers/imagine-aim/18bh
Questions
What size mattress is in the Grand Design Imagine 18BH?
The main bed is 60 × 76 in (Grand Design spec sheet, 2025).
What size are the Grand Design Imagine 18BH bunk mattresses?
32 × 72 in (Grand Design spec sheet, 2025).