1. The dimensions of the new invoice special seal are specified as follows: 1. The shape is oval and the dimension is 41× 31 (mm); 2. The side width is 1 mm; 3. The middle is the tax number, with the height of the 18-digit Arabic numeral 3.7mm and the width of 1.3mm, and the total width of the 18-digit Arabic numeral 26mm (font is Arial); 4. The height of Chinese characters on the circular row above the tax number is 4.2mm, the circular row angle (included angle) is 211-261 degrees, and the distance between the characters and the inner side of the sideline is 1.5mm (font is imitation of Song Dynasty); 5. The word "Special Seal for Invoice" under the tax number is 4.6mm in height and 3mm in width, and the distance from the center line of the extension seal to the top of the lower horizontal line is 4.2mm (the font is imitation of Song Dynasty); 6. The horizontal number under the special invoice seal is 2.2mm in height and 1.7mm in width. The distance from the center line of the extension seal to the top of the horizontal number is 11mm (font is Arial). This horizontal number can be omitted when the number is not needed: 2. The style of the old special invoice seal: 1. The old special invoice seal is oval with a long axis of 4.5 cm, a short axis of 3 cm and a side width of 1.1 cm. The characters are divided into upper, middle and lower parts. The upper half circle is engraved with the name of the customer (the name of the customer must be consistent with the name of the tax registration certificate). The names are arranged according to the No.1 model chapter within 17 words, and those with more than 17 words are arranged according to the No.2 model chapter. The tax registration code is engraved in the middle, and the distance between the code number and the left and right lines is 1.8 cm. The words "Special Seal for Invoice" are engraved in the lower part. The font is imitation of Song Dynasty. 2. If ticket users need to engrave two or more "special invoices" for business, they must add (11), (12), (13) ... serial numbers in the center below the words "special invoices" to show their identification.