These are slow release Metformin, and the mechanism used to produce the slow release means they have to be big. I don't know of a slow release version that is any smaller. The normal (non slow release) version of met tablets are much smaller, but many of us get unacceptable side effects (diarrhoea, cramps, bloating, wind etc.) when taking them, and ask for the slow release version which suits many of us better. You are lucky to have been prescribed the SR, as they are a lot more expensive, but I realise that doesn't help if they are too big to take. Whatever you do, don't be tempted to break or crush them.... they won't work properly if you do. I suggesdt you discuss this with your doctor, or pharmacist.