Yes, but ancient i believe. Its the size of our Us Nickels. Did see some size differential stuff on them as well.
I'm not really good at these but someone will come along and help. I do know the Chinese still make these as replicas today and they age them to make them look old and original. They are sold in tourist shops all over China and even in the U.S. in China Towns in bigger cities.
It is a coin of the emperor Wang Mang, 7-23 AD. The Denomination is Five Zhu, and the obverse reads "HUO QUAN". Nice example.
I wondered what you meant by: "Have seen some just like this , but not exactly the same." All ancient coins including the Chinese cast cast show a lot of variation in minor details. In the case of this one there are people who will take note of things like whether the left character shows all three 'legs' the same length or, like yours, the outside one shorter. In some cases experts have assigned meanings to such details which are not understood by non-specialists like me. The photo below shows two Huo Quan. The one on the left has the shorter leg and a curved to to the T shape element on the Quan while the one on the right shows three even legs and a straight top to the T. When you say 'not exactly the same' you need to know how 'exactly' you are talking. We have posts above that say "Chinese?" so I doubt that person cares in the least about "exactly-exactly" details. You will find a lot of this sort of thing throughout ancient coins. I do not specialize in Chinese cash of Wang Mang so I really don't care about little things like this on the few Chinese coins I do collect so, to me, the two below are the 'same'. If you asked me about a coin in my areas of special interest or if you asked a person who does collect these as a specialty, you will get completely different answers. That's why we have to be careful about 'exactly'.
I used to collect "Huo Quan" coin variations long time ago. Still have some of them in 2x2. Yes, due to the various mints and not-tight-at-all regulations back then, there are many variations of the coin. Some have the characters reversed, some have a big dot on top/bottom, or corner. Some have no rim (to save bronze during later inflation times), while others are super-thick. We called the thick coins "cake Huo Quan"... like 23g in weight.