The Royal Ripple says on its page that it is 2 1/2 inches in diameter. Looking at the scaled image, you know it's not correct, because the Sasha Signature Plug is 2 3/4 inches and looks MUCH larger. I own the Royal Ripple and I know that it is only 2 inches at the most. In fact, I found the review that this had originated from, where the person said that the diameter of the BASE was 2 1/2 inches (which is still a little weird).
So, the point of this post is that the product page is not always correct about size. I know that your mentors/extended template always tell you to include the measurement of the toy, but if you don't bother to take out a tape measurer and measure it, please don't copy and paste what is on the product page.