Hi all,

I did buy this plant as a Finger Lime "Citrus Australasica" but I think it is a Orange Thorn "Citriobatus pauciflorus (C. spinescens)"
Leafs are 6mm width

Can it be a Finger Lime?
Thanks
//Leif in Sweden

Mike would have the most experience with the Australian citrus.

The M.australasica, especially young plants, and Citriobatis look very similar.
Citriobatis doesn.t have citrus type essential oils in the leaves. as I remember. It is a slightly "finer" plant, the leaves and thorns smaller and closer together than Microcitrus. Try image search for both.
However, a growth flush of either can look pretty similar, so it's hard to tell from your photo. I have both plants so I will double check about the essential oils.

Citriobatis doesn't seem to have any esserntial oils in the leaf, as per M.australasica. Citriobatis leaves are more "D" shaped with teeth on the end.
The Microcitrus leaf is more "V" shaped with teeth on the end, although young leaves are a bit "D" shape. Your photo is a bit too detailed/close up, but I would say it's Microcitrus.