First, let me say that I am not a hat pin collector or historian. But of course since they are related to hats so I have learned a little (maybe very little!) along the way.
Hat pins, such as most of the ones you show, can be hard to date accurately. The earlier ones are easier to date, usually by the length of the shaft or the type of finial and attachment methods. Most of yours look to be post WWII, a few 1940s and more seem 1950s... and a few might be early 1960s. Some, such as the small carved (?) ones in the top RH image might be 1930s. I agree with Melanie that the white funnel shape one may be earlier, an Edwardian generic hatpin type that was sold in packs.
There are hat pins made by famous makers and jewelers, and then those general types (like yours) made by hat manufacturers and sold over the counter or sold directly to milliners.
My Edwardian hatpins are between 9" and 12" long. Victorians are not usually longer than 9", in general.
I do not think any (except the white funnel) of yours are older than 1930s. There is one that looks like it is rolled gold/gold filled and perhaps has been modified from an earlier piece as the head looks antique. This was very common.
Hatpins were often made by the milliner to match a hat, or made as a home craft item (popular in the 1940s and 50s). Tops could be taken off and new tops added which was very common. Older antique shafts can be married to almost anything and dealers sell it as an original antique hat pin. So as you see, it can be difficult to date hat pins! There are clues, looking for evidence of solder, glue, lack of a finial or finding, glass that has been heated to a shaft with no finial, wrong type of metal for the shaft, lack of a pointed end, etc.
Some of them are very cute!