Are these the FIRST Sonic hair accessories?
They could be...and they star Amy Rose! Here, classic style Amy has a portrait in a rhinestone-ringed heart shape charm. The charm is metal, and attached (probably like a bead) to a thick black elastic hair band.
The second item is a springy / soft elastic fabric double head band. This is black, and has repeating pink Amy sihloutte heads all along it. These are Sega Shop winter 2018 / 2019 items, and should be about 13 dollars each....which is steep for these fairly simple items. Charm-band headbands like this as you may have seen online are also favored by fakers.

There are machines in China that can set any design in the center of the generic charm, and that's what's been done here...only by SegaShop which makes it official. 13 dollars for a headband or a single hair tie though---the SegaShop always seems costly even if these are the first Sonic hair accessories to get made.