This item is a Magic the Gathering playmat, from the Eternal Weekend Pittsburgh 2023 Vintage Championship North America, featuring the Chalice of the Void artwork by Mark Zug originally featured in Mirrodin.
The playmat is embroidered, i.e. it has been stitched with thread on the borders to improve durability and to make it even more visually stunning.
This item is of extreme rarity since it wasn't sold outside of the event.
The playmat size is around 35cm x 60cm.