So a little tutorial, I will say this wasn't my idea that some-one has already posted how to do this but this is how I do it with my favourite choice of Martha Stewart border punch. It's a deep edge doily punch, I've used to punch out this border from an A4 piece of card.
This is way I love it so much, the little oval shape between daisies have pointed ends and I use that as a guide to cut down the middle.
Again the lowest hole is perfect to snip up to which you do on each one.
I would recommend a repositional glue especially the first few time while you gain the experience how to do it. I use Herma repositional all round the edge on the back of the card.
I line the border up using the lowest hole as a starting point. Then I sort of fold over where I snipped and knowing the lowest hole is the height I need to be. I continue to fold slightly all around the mat.
You can see the lowest hole being used as my guide line here in this photo.
Lucky for me this strip has gone completely round the mat but doesn't look quite finished but this is where I will place a flower. So when you stick you image on be sure the join is where you wish to place the flower.
Now if you mat is larger, you will need to use the other strip and I usually overlap one end completely or I will cut the strips so I have two joins and where I will place a flower on each joins.
Here's the card I made using the punch, you may have seen it before, its the one I made for the Simon Says Stamps Challenge.