@ESP-918 - there are many more experienced collectors who will no doubt comment in detail - but to my understanding the Staunton design emerged in 1849 with a lineage out of Old English, St George and Northern Upright styles … with the Staunton pieces designed for greater stability.
My knowledge is gleaned from a wonderful book by Holger Langer - On the Collecting of Chess Sets, which I highly recommend. It has a chapter dedicated to Staunton pieces. It notes that the design was informed by Nathaniel Cooke, John Jacques and Howard Staunton. The book details a raft of attributes of the Staunton style and the FIDE Manual also describes attributes associated with the Staunton style, I believe.
I’ll get cramp typing any more on my phone 😉 but I hope the references above help.
What exactly is Staunton design in short form?
Also as I Understand Lardy, Chavet , German Knight all can be called Staunton right? If so , what other design there is besides those that is also classified as Staunton ?
And last question what is the difference between Lady design and Chavet?