Um, I really suck at math (more so at 2am) but I think if you have a 1 to 1 and you want 1 to 1/8, you need to make it 8 times bigger? I took the liberty of downloading your image and doing the following: bigger the circled bit by 400%; gaussian blur 1.5 to smooth it a bit; and unsharp mask set to 100 1.0 0 to bring back some of the crispyness. Mind you, even re-sizing this much it looses a lot in quality. But I don't know of any other way to do it. Maybe someone with more knowledge can enlighten us.