Would this fit a cot that specifies a mattress size of 1310 x 695 x 120mm?

Hi Felicity, thank you for your inquiry, the Babyhood mattress would be too small for the cot you have and would give to big of a gap around the sides of the cot. I have added a link to some mattresses that may suit your cot better reducing gaps. We hope this helps. https://www.babyonthemove.co.nz/index.php?route=product/search&search=export%20mattress. if you follow the link https://www.babyonthemove.co.nz/store-locations/ this will take you to our online store finder. Here you can find contact details for your nearest Baby On The Move Store where one of our team experts will be happy to assist you in your product search and help answer any further questions you may have.