A tape measure, paper or your phone for notes, and removable painter’s tape that is safe for your floor or wall. Test the tape in an inconspicuous spot first. Measure from a stable position; don’t climb on furniture.
PRODUCT FIRST
Find the exact model and assembled dimensions.
Save the product link and choose the exact size and configuration you plan to order. Write down its assembled width, depth and height. Check the current product page and assembly instructions, especially when the listing offers several versions.
Package dimensions describe the delivery boxes. Keep them separate from the dimensions of the finished piece.
THE REAL ROOM
Measure the space you actually have.
Measure side to side, front to back and floor to ceiling at the intended spot. Include baseboards, window trim, outlets, vents and anything else that affects placement. Keep room doors and exits clear.
A staged product photo can help you picture the style. It cannot tell you how much usable space is in your room.
MAKE IT TANGIBLE
Tape out the footprint.
Mark the assembled width and depth on the floor with surface-safe removable tape. Walk around the outline and try the room the way you normally use it.
- Pull out the chair as if you were sitting down.
- Check the path past the bed or cabinet.
- Reach the outlet without squeezing behind furniture.
- Open nearby room doors and check the exit route.
This outline often makes a bulky piece easier to judge than a number on a shopping page.
CLOSED IS ONLY HALF THE CHECK
Allow room for moving parts.
A cabinet that fits when closed may block a walkway when its doors or drawers open. Check the manufacturer’s opening dimensions and include that space in your taped layout.
Compare the closed and fully open dimensions, plus the specified operating clearances. Don’t guess a universal clearance: designs differ.
Check three spaces, not just the footprint
- Closed footprint. Tape the assembled width and depth.
- Moving parts. Add the exact opening dimensions and operating clearances from the manual.
- Walking route. Try your normal route with the taped layout and moving parts considered. Keep exits clear.
FROM THE DOOR TO THE ROOM
Check the route into the room.
Measure doorway openings, hallways, tight turns and relevant stair access. Compare the delivery boxes with the entire route, and consider whether the completed piece could be moved later.
A doorway measurement alone does not confirm that a long box can turn a corner. If access is close or uncertain, ask the retailer about delivery requirements before ordering. Don’t move a heavy piece alone to test the route.
SPACE FOR THE BUILD
Leave room to assemble it.
The finished height is not always the full clearance needed during assembly. Some products need room to build on the floor and raise into position; others use a different assembly method. Read the exact instructions before choosing where to build it.
IKEA’s PAX guidance, for example, calls out different ceiling requirements for door configurations and assembly methods. Check your exact frame, generation and manual; those requirements are not a rule for every wardrobe.
Official IKEA PAX planning guidancePLAN THE INSTALLATION, TOO
Check anchoring requirements.
Look for the manufacturer’s wall-anchoring requirements and other installation conditions. Include required anchoring in the plan.
Tip-over prevention also matters when a manual does not explicitly require anchoring. CPSC’s Anchor It! guidance recommends securing furniture with drawers, doors or shelves to the wall to help prevent tip-overs.
Follow the exact product instructions and use anchoring devices suited to the furniture and wall. If the wall type, support or suitable hardware is uncertain, get qualified help rather than improvising. Keep furniture that requires anchoring out of use until it is installed as directed.
CPSC’s official Anchor It! guidance