It might just be this one. They also do a 2.5gbe 8 port i think which is a similar size, but doesn't come with the 10" rack ears, just the ones that fit it to a 19" rack. Though youd never be able to tell from the website because they cant be bothered to make it clear. Digitus do a 16 port 10" switch too i think.
Yeah Digitus do a range of 10 inch rack switches but AFAIK no 2.5 or 10gbe options, the Zyxel has screw holes for rack ears and happens to fit a 10 inch rack but is sold with fittings for 19 inch.