Most buyers measure the room, not the bed. They get a super single frame because the BTO master bedroom is tight, then they buy the cheapest mattress available. That is a mistake. A 107 by 190cm bed is a permanent fixture in a 4-room flat. You live there every night.
The frame will last ten years. Invest where the human weight goes, this is how you save money. A pocket spring core handles the humidity better than solid foam blocks. Cheap foam traps heat. SG humidity often around 80%+ eats away at cheap materials. Solid wood frames resist warping, but the sleeping surface needs airflow. If the foam density is low, you will sink.
Got storage or not? That decides the clearance needed. If you choose a hydraulic lift, check the ceiling height. A 190cm mattress plus frame leaves little room for overhead access. Somnuz® mattress line handles the local climate well. You won't wake up sticky.
Don't buy a king frame for a single room. It costs more and blocks the walkway. Leave 60cm clearance on the exit side because that is safety first. The cheap fabric will pill one eventually. Buy something you can wipe down leh.
Super Single beds measure 107x190cm, fitting standard HDB master bedrooms well. Leave 60cm clearance on the exit side for easy walking. Lift doors often limit furniture entry at roughly 90cm wide, so measure corridors before buying while checking Megafurniture showrooms for fit. Check dimensions carefully to ensure the frame enters without forcing it through tight internal doorways.