Eyelets - Can anyone help me?

Hi girls
I've had so much trouble trying to find eyelets big enough for my mini albums.
I have some great eyelets from Stampin' Up (jumbo eyelets in the bronze & silver) but they are so expensive.
The only other eyelets I can find are too small to go through the thickness of my mini album pages.
Also, I don't really know how to check the sizes - what the mm refers to - diameter or length of the middle cylinder??? It's so frustrating trying to buy these on line.
Can anyone help me pleeeeeeeaaaaaaaase!!!!

I made this book today for my niece, Danielle for her birthday on Monday. The book is an envelope mini album which has 12 pockets, one for each month of the year. Each tag has an area to note down birthdays for each of her friends & family.

My June Mini Album

Welcome to my blogspot

Hi! Welcome to my blog. I've just created this blogspot so bear with me while I customise it. I would love some feedback. I know the pics look too big on here but I haven't worked out how to reduce their size just yet.