Skips come in many different sizes. The smallest is what's known as a Mini Skip, can hold up to 1.5 cubic metres of waste. The next size is a Midi Skip which is ideal of bathroom and kitchen refits and can hold up to 3 cubic metres. The most common skip size is what's known as a Builders Skip it can hold up to 4.6 cubic metres of waste (as much as 50-60 bin bags) and is available everywhere.
There are larger skip sizes available but may not be suitable for a domestic situation.