My local Tesco had a row of Celebrations and Roses chocolate tins stacked across an aisle reading "MERRY CHRISTMAS". It was 11 tins high and each character took up to 9 tins across, with 2 tins between each character.
It's all estimates but that's 1,584 tins. Each with 855g of chocolates. It was monstrous.
Wish I had a photo