Whilst you are thinking about buying, as opposed to having already done so, think very carefully about what you buy. Like you, we bought a load of "standard" stock fencing to repair the broken fences round our small holding when we moved in a few years ago. Standard spec is 8/80/15 (8 horizontal strands, 80 cm high and 15cm between verticals). This is the one everyone sells, and has in stock and because of volume is the cheapest.
My advice, for what it is worth is think again! This size is perfect for trapping a lambs head when they inevitably try to commit suicide going for that bit of grass on the other side. Then they will either rip their ear tags out trying to get out, or get stuck all night or strangle themselves. One dead lamb makes that an expensive bit of fencing.
Tornado do a lambsafe spec - 8/80/22 in high tensile steel that is only very slightly more expensive (actually uses less wire since the verticals are further apart). Sheep, being sheep, will still put their head through, but the wider spacing means they can usually get back out again with ease.
We are replacing a lot of fencing now to avoid problems (and the added benefit is that HT stuff can be tensioned tighter and doesn't stretch when they rub up against it and this doesn't need to be retensioned as much.
We all know how expensive fencing is, but spending a little bit more on the wire may be a sound move in the longer term. Your supplier can almost certainly order it for you without real difficulty.
Steve