Hmm, the snippets I have don't give a super clean match for a 1.2m cot specifically, so I'd be cautious recommending something that might not fit right. That said, someone in my mum group mentioned AiHome bed rails, they're designed for local Singapore and Malaysia bed sizes rather than the longer European 2.0m beds, so the fit tends to be better than generic imports. Worth checking whether they have a size that suits a 1.2m cot, since the rail length and mattress height both matter for a secure fit at 10cm. Might be good to measure and confirm with the seller before committing, just to be safe.