Unicorn Brass Darts Darrow Feather - Made In England -cannot confirm weight,code

Description

I DON'T KNOW ANYTHING ABOUT DARTS SO PLEASE ASK QUESTIONS PRIOR TO PURCHASE.
Please read the complete description below very carefully as each of these darts have flaws. Please use the zoom in feature on each photo to get a better look.
PLEASE READ THE COMPLETE DESCRIPTION AS I AM NOT AN EXPERT IN DARTS. ASK QUESTIONS PRIOR TO PURCHASE. Unicorn Brass Darts Darrow Feather are in a plastic box labeled "Medium (26 Grams) Code O4 - Made In England".
However, I do not know if this is the actual size, weight or code for these darts as I am unable to weigh them.
These darts are in GOOD condition (on a scale of mint, excellent, GOOD, fair, poor) with wear, marks, paint loss and scratches on each dart, including wear to the feathers. Specifically, part of the feather has come off one of the darts (see second photo). Please see photos for details.
Due to the general wear, along with the uncertainty surrounding the weight, size and code of these darts, if you are looking for a new item, this might not be the right listing for you. I have taken extensive photos of this item so please use the zoom in feature to get a better look. If you need to see additional photos, please let me know.
SEE PHOTOS FOR ADDITIONAL DETAILS
Please note, I do my best to describe each item's condition that I sell but please remember this is not to be considered an exhaustive list of any wear that may or may not be on each item.
Overall, an awesome addition to a collection. Thanks for looking.