The Letter Tet(or Tes) has a size of 3X3 kulmusim. The left head of the Tes should look like the head of a Zayin, having completely squared corners and 3 Tagin on top of it. The lower left corner of the Tes should be squared as well. However, the lower right corner should be rounded. The right head of the Tes should curve inside the Tes, not far enough to touch the base of the Tes, but rather enough so that it's clear that it is curved inwards. The two heads of the Tes should not touch each other, as this would make it invalid.

The Letter Shin is easily distinguished by its three heads. The spacing of the Shin is something that takes practice for a Sofer to write correctly. The leftmost leg should have the head of a Zayin. (According to the Arizal,the left leg has the head of a Vov.) The head should have 3 Tagin on it, like a regular Zayin. The heads should not touch one another at all. Also, there should be no more than 3 heads in total, or the letter would be rendered invalid. The bottom should come to a point, and not be rounded or flat.