Ottoman beds use the area beneath the mattress for storage, but the lifting mechanism adds considerations that ordinary bed frames do not have. Measure the room and check the mattress and lifting guidance before choosing a model.

Measure the full frame footprint
Use the external frame dimensions, not only the mattress size. Upholstery, side rails and the headboard all add to the room footprint. As one checked example, the VASAGLE RMB616GN01 slate-grey double ottoman bed is listed for a 135 × 190 cm mattress, while its overall footprint is approximately 138.4 × 198.8 cm. Check the product page for current specifications before ordering.
Allow the platform to lift
Check the direction in which the mattress platform opens and make sure nearby furniture, shelves or sloping ceilings will not obstruct it. Leave enough room to stand safely beside or at the end of the bed while lifting and lowering the platform.
Check mattress guidance
Lifting mechanisms are designed around a permitted mattress range. Follow the manufacturer’s weight and size guidance rather than assuming any mattress will operate correctly. Confirm whether the retailer listing includes a mattress; do not infer this from product photographs.
Plan how you will reach the storage
Consider whether the bed opens from the end or side and whether the user can comfortably stand in the required position. Think about the everyday route to the wardrobe and bedside table as well as access when the platform is raised.
Do not overload the storage base
Use any stated storage-load guidance and keep items clear of moving parts. Store heavier items where they will not shift into the lift mechanism, and follow the assembly and safety instructions supplied with the bed.
Compare storage-bed dimensions carefully
The RMB616GN01 example lists an overall height of about 110 cm and under-bed storage height of about 31.7 cm; these measurements describe different parts of the bed. Verify the exact variant, current dimensions and mattress requirements on the product details page before deciding whether it suits your room.
Browse our beds and bed frames for current storage-bed models, and compare mattress size with the complete frame footprint before ordering.