The Ruger LCP vs Sig P238 size comparison image is rendered with the smaller Ruger centered top to bottom and right to left. The height of the Ruger (3.6 inches) is .3 inches less than the Sig Sauer (3.9 inches). Surprisingly the difference in length between the two is basically the same. The LCP is comes in at 5.16 inches long while the Sig comes in at 5.5 inches.
The most noticeable difference between the Ruger LCP and Sig P238 other than the price is the weight LCP is 9.4 ounces while the P238 is 15.2 ounces.