Staedtler Mars Circle template is ideally designed to use with 0.5 mm pencil lead for technical drawing that requires a precision circle. Staedtler Mars Circle template measuring 7 1/4" x 4" is made of strong durable green plastic with matte-finish to reduce glare. Circle template with 39 circles up to 1 3/8" makes perfect, geometrically correct shapes every time. Green plastic with matte-finish reduces glare. 7 1/4" x 4". Circle template with 39 circles up to 1 3/8". Designed for use with 0.5-mm pencil lead. Transparent template for accuracy. Matte-finish green plastic. Corner risers prevent ink blotting