okay!!! A lot of these commenters obviously thought what I did - that the cupboards are a deep browney grey!! I think the responses would have been very different if we knew the cupboards were white. If you re-read thru the responses you will see that. Perhaps try re-posting the dilemma with a better pic. One of those original tiles may actually look ok.

My vote is for matte as well. Especially in the bathroom. If the tiles are near the shower, the glossy ones seem to lose their shine to the soap scum and need constant cleaning like glass screens, whereas it doesn't seem to happen on the matte tiles which are quite easy to clean. The stove and the sink are really the only places needing a spashback in the kitchen and my vote would be for matte finish there, even if you use the same tiles in gloss every where else.

We have tiles that do not have a gloss finish. They are Encaustic, or at least I think that is what the style is called.

Sarah Sarah is right. You won't find a perfect match unless you find new old stock for sale on ebay or gumtree - but you have to be lottery lucky. Try moving tiles from under the fridge, or under the dishwasher, or under the bottom shelf of the pantry. However you will probably break about half of them in the removal process. Don't even bother to try and trim different tiles like annb1997 has suggested as there are too many variables with thickness, finish, texture, colour and gloss level. A mismatched tile will be obvious every time you walk into the kitchen and be a permanent annoyance. Best of luck, Dr Retro of Dr Retro House Calls