OMG the needle sizes are almost to small to see!

I have looked up the manual and it says to use between 65/9 or 75/11 - does the last number indicate the size then?
And if so, I only have a 14 - well several of them, I didn't get different sizes with the machine.

Since I am always one for plowing ahead (like an idiot), would it be ok if I was extra careful with the 14? I am folding over the edge 2x and attaching the curtain tape so altogether there is a bit of material there.