I've finally managed to get some 4mm needles, (it took ages to get the correct prescription, first time I tried I got 5mm needles, the second time I tried I got 2 Novopen4 instead of 2 boxes of 4mm needles! The GPs mistake not the chemist!) and they are tiny little things. They work OK for injecting in fat areas too, for small amounts of analogue insulins at least, I had assumed you were meant to use longer needles for injecting in fat, but the nurse said it didn't matter - the longer needles are more for larger amounts and more viscous insulins she said.
I only found out that needles this small existed by accident, I thought 5mm was the smallest, so I thought I'd post this in case anyone else wanted smaller needles but didn't know they were available.
I only found out that needles this small existed by accident, I thought 5mm was the smallest, so I thought I'd post this in case anyone else wanted smaller needles but didn't know they were available.