Can anyone recommend what type of scales I should buy for keeping track of our tortoise's weight?

We haven't collected him/her yet but I am getting everything ready.

Hello there. For a small tortoise, scales weighing up to 1kg are useful. Here is a link to some you might find useful:

http://www.ebay.co.uk/itm/1000g-x-0-1g-Digital-Pocket-Weighing-Mini-Scales-includes-batteries-and-pouch-/170710704128?pt=UK_Kitchen_Accessories&hash=item27bf26a000

Over 1kg I use digital bathroom scales. I weigh torts up to 3.4 Kg and find them accurate enough. I hope this helps.

Take each reading a few times to increase accuracy...you can always check by weighing shop bought products in minimal packaging.

Regards, David nr York.