The tiling grid for Sentinel-2 Level-1C products is now available for download.
Sentinel-2 products are a compilation of elementary granules of fixed size, along with a single orbit. A granule is the minimum indivisible partition of a product (containing all possible spectral bands). For Level-1C and Level-2A, the granules, also called tiles, are 10,000 km2 ortho-images in UTM/WGS84 projection.
More information on Sentinel-2 products can be found on the Data Products page.