Re-purposed large truck leaf spring thick) makes up the back plate. The knocker and support hardware are from used rail road spikes. Its all held together with hand forged steel rivets. Back plate measures 5 tall by 2 wide.
^ there's a fire steel version. just need the tail flat and it would be good for a bracelet. I love my little whale buddy. Based on two originals from New England, I made it up from a section of old truck leaf spring - so probably 1080 to 1095 steel.