hope this is right section, closest match I think.
need a new king-sized bed frame and mattress. I know IKEA are 'european size'. Found a good 'British' king size mattress. If I have it right, the IKEA frame will be the same width (200cm) but 10 cm longer (160 cm as opposed to 160cm for the mattress)
will this 5cm top and bottom be a mistake/annoying? IKEA frames cheaper but not worth it if it is wrong!