For anyone in the UK the Royal Mail are banning all bladed items from April 22nd 2024. This Includes sharp scissors
"You must not send any item that has a blade, in particular, ‘Bladed Articles’ as defined by the Criminal Justice Act 1988 or ‘Bladed Products’ as defined by the Offensive Weapons Act 2019. Such items include, but are not limited to, any knife blade, any kitchen knife (regardless of size or design), bread knives, knives that can be used for hobbies and trades (regardless of whether they are marketed as knives, for instance, utility knives and snap-off cutters), gardening and farming tools that have a blade, any trade tool that could commonly be described as a knife, butcher’s knives (including meat cleavers), cutlery knives, scissors with sharp edges, sporting equipment with a blade, replica and antique knives (including those used for re-enactment purposes), handmade and bespoke knives, open razors (where the blade is exposed), any axe, any sword, survival knives, or machete"