This pool is certainly not worth the price. It is no heavier than the plastic pools you see in front of the big-box stores all summer; it did SEEM stronger at first glance, but cracked on day 2 when one of my 2-year-old toddler granddaughters caught her foot on the edge while getting in (she only weighs 25 lbs.) The 3.75’ measurement is very generous - that is the measurement of the TOP of the pool, including the edge, which is a couple of inches on either side of the pool, and measured at the widest point of the petal design. If you measure the bottom of the pool, from point to point of two of the “petals,” it is exactly 2’ across, so that is the actual space for kids to sit in. My 2-year-old grand-twins cannot sit in it together. Had I paid $5-10, this is the pool I would expect. The price being charged is simply outrageous. 
It gets the one star for being delivered on time.