Let's Make Robots!

Pin Connector size for picaxe

Hi everyone,

My first post here. Started reading this couple of weeks ago and have most of the parts for the start here project. 

Question itself - I am having trouble getting pin connector blocks here in uk and am not sure about the sizes. I AM a beginner here so please bear with me. I have bought 0.1" female pin crimps to make my own jumper cables, however, when I try to hook that up to picaxe board its loose. I assume that thats the wrong size.

So what size pins are they and where in UK could I get them? Or am I completely out of my depths?