We have two fridges. A largish one in the utility room, which stocks drinks, vegetables, fruit, sauces which need a fridge. And a smaller, under the counter, one in the main kitchen. That tends to keep milk, butter & spreads, sandwich meats and the like. Until we created the utility room a few years back, that was the only fridge we had and it had to cope with everything (which meant we didnt keep as many drink bottles cold as we do now). So, we had a small fridge for around 40 years of our 48 together with no problem - and I could easily go back to just having that one if we ever moved house. Standard dimensions, in height & depth for going under the counter and a standard 600mm width.
I suspect Americans would find our European fridges tiny in comparision with their usual ones (and I know from earlier threads Americans tend to fridge much more than Europeans do), so my experience may not be much help.
