Doctor Who Crack in the Wall Stickers:Travel through time and space with Doctor Who and this Crack in the Wall sticker set. Ever wanted your very own crack in the Time Field, but couldn't find a TARDIS to explode? This Crack in the Wall sticker set is for you! The set features a crack and a crack with a dinosaur eye peering through. Each crack measures approximately 12-inches in length. There are a total of 3 stickers in this set.