Scrabble of points for each lettered tile is based on the letter's frequency in standard English; commonly used letters such as vowels are worth one point, while less common letters score higher, with Q and Z each worth 10 points. The game also has two blank tiles that are unmarked and carry no point value. The blank tiles can be used as substitutes for any letter; once laid on the board, however, the choice is fixed. Other language sets use different letter set distributions with different point values. Tiles are usually made of wood or plastic and are square and thick,
Scrabble letter distributions are included here as they are sometimes used in borrowed words. Blanks do not exist in this game. German-language editions of Scrabble contain 102 letter tiles, in the following distribution: Before the current 102-tile set, German language sets had 119 tiles. With the larger sized tile pool, players had eight tiles at a time on their racks, as opposed to the standard seven. The letter distribution for this larger set is: German sets marketed as Foreign Language Editions produced by Selchow and Righter had 100 tiles with the following distribution: Before the Foreign Language Editions produced by Selchow and Righter