$$\footnotesize \begin{array}{ccc} \textsf{Outside} & \textsf{Outside} & \textsf{Wall} & \textsf{Inside} \\ \textsf{Diameter} & \textsf{Diameter} & \textsf{Thickness}& \textsf{Diameter} \\ \textsf{(in.)} & \textsf{(mm)} & \textsf{(mm)}& \textsf{(mm)} \\ \\\\ \frac{1}{8} & 3.18 & 0.813 & 1.549 \\ & & 0.889 & 1.397 \\[0.125cm] \frac{3}{16} & 4.76 & 0.813 & 3.137 \\ & & 0.889 & 2.985 \\[0.125cm] \frac{1}{4} & 6.35 & 0.889 & 4.572 \\ & & 1.24 & 3.861 \\[0.125cm] \frac{5}{16} & 7.94 & 0.889 & 6.160 \\ & & 1.24 & 5.448 \\[0.125cm] \frac{3}{8} & 9.53 & 0.889 & 7.747 \\ & & 1.24 & 7.036 \\[0.125cm] \frac{1}{2} & 12.70 & 1.24 & 10.21 \\ & & 1.65 & 9.46 \\[0.125cm] \frac{5}{8} & 15.88 & 1.24 & 13.39 \\ & & 1.65 & 12.57 \\[0.125cm] \frac{3}{4} & 19.05 & 1.24 & 16.56 \\ & & 1.65 & 15.75 \\[0.125cm] \frac{7}{8} & 22.23 & 1.24 & 19.74 \\ & & 1.65 & 18.92 \\[0.125cm] 1 & 25.40 & 1.65 & 22.10 \\ & & 2.11 & 21.18 \\[0.125cm] 1\frac{1}{4} & 31.75 & 1.65 & 28.45 \\ & & 2.11 & 27.53 \\[0.125cm] 1\frac{1}{2} & 38.10 & 1.65 & 34.80 \\ & & 2.11 & 33.88 \\[0.125cm] 1\frac{3}{4} & 44.45 & 1.65 & 41.15 \\ & & 2.11 & 40.23 \\[0.125cm] 2 & 50.80 & 1.65 & 47.50 \\ & & 2.11 & 46.587 \end{array}$$