This is a remix of a pin I found online, in the zip file are 3 STLs one has the date for this year, another has "All gave some, some gave all." and the other has the original text as on the pin.
WARNING: BE WEARY OF THE TEXT WHEN PRINTING! If your slicer offers a preview please check the text will print well!!!
The two in the pictures were printed at 110mm tall and I wouldn't recommend going much smaller than that because of the text. For the model that has the original text I would recommend a very large print - I have not done a large one myself but it's there for your choosing.
Remember them, give thanks and wear/print your poppy with pride!
Any tips will go to the British Legion Poppy Appeal charity or you can donate to them directly here: https://www.britishlegion.org.uk/get-involved/ways-to-give/donate?seg=WPDW3B