WOW! Finally! I've tried every insole on the market over the years. I tried them when I was still able to be a CNC Machinist and Forewoman to try to save my Lower Back and ease my Plantar Fascilitis and now that I've had to quit my trade and go into Physical Therapy because of the aforementioned back getting much worse and going from "really painful at a high-intensity, heavy-lifting job pain" to "I can't even walk upright or do anything but gentle stretches type-pain". I've begun Physical Therapy for my Lower Back & a Torn Rotater Ruff (yeah....terrible luck, I know) so I'm on my own for the PF because the Physical Therapist can only target so many areas at once. I've been trying inserts for at least 10 years and they all caused my nearly instant and HORRIBLE pain and usually made my PF much worse. Plus, they usually required cutting and trimming and didn't fit a variety of shoes to be truly versatile. I bought these and kept all of the packaging because I fully expected to be sending them back. Well...I threw out that packaging after my 1st week using these in my Running/Gym shoes as well as my casual shoes and some Snow Boots. These have not just improved my Lower-Back Pain immensely....but my PF is 65% better (I'm also using PF Compression Socks, mind you and wearing those to bed to repair/heal). What's amazing to me is that I'm also going to the Gym and doing 90-minute Cardio Sessions 6 days per week on top of the Physical Therapy to strengthen my whole body, lose the weight I've gained being unable to work/workout, and to build muscle near the areas that are injured. So I'm wearing these things in my Running Shoes and wearing them for 90 minutes per day on Standing Ellipticals, Seated Ellipticals, Treadmills, and Leg Press Machines. And there's NO PF pain throbbing afterward! These are ROCK HARD insoles. Please keep that in mind. I think most people *myself included* fall for the "gel insoles" and "memory foam comfort" stuff thinking that will be better for our feet and PF (or back issues) because it seems like a cushioned sole would be best. Now that I've tried these, I get why the others didn't work. We need HARD Support. If you can't tolerate hard insoles for some reason....these are not for you. If you have lower back pain or PF and other insoles have failed you....you NEED to try these. I purchased the Women's Size 8 - 8.5 and these fit my Running/Athletic shoes PERFECTLY. Slipped them right in (after removing the original insoles, of course) and dared to go straight to the Gym and *hope* these would work out. Well...they did! Much better than my *expensive branded insole that came with said running shoe* and a notable difference in PF right away. I didn't have to trim them at all and since they are so hard, you can easily slip them into and out of your shoes for a quick change. I put them into my furry Uggs the next day and they fit just as well and kept the PF and lower back pain at bay. I couldn't believe they were working. I am so used to them feeling "OK" at first and then after a day or two causing a "new" pain or worsening old pain and having to throw away expensive insoles. These are like a MIRACLE! I haven't had a burning/shooting heel since I put these into my running shoes and considering my 6 days per week Gym Schedule and Physical Therapy is new to my body as well as HARD on my body....this seems amazing to me. Don't stress about the sizing. It's right on point. Get whatever closely matches your normal shoe size because these are right on point. They're also a bit wider (than I need because I have a very "normal" width foot) so if your foot is a little on the wider side, these have the extra space to fit them without making "normals" fit any lesser. The arch is very high and hard and really supports you where you need it. The contour and outside diameter is cut much more accurately than others and I think that's part of why no trimming is needed and if you buy your correct size....these should bit your current shoes like a glove. I originally felt really stupid for spending this kind of money on *yet another* pair of insoles that are supposed to be "so awesome" ....but never worked for ME. Now I can't wait to try some of their "slimmer" fits so that I can wear my evening shoes and other slimmer shoes without pain, as well. The photos I'm posting show the running shoes I wear for Physical Therapy and the Gym with the original insole taken out in one shoe....and this insole placed inside of the other shoe. The insole itself is laid next to the shoe for size and width comparison. I also included a photo of the insole from the side-view to see the contour, and a photo of my bare foot (that's a compression sock) against just the insole to show how good the sizing is and how it fits a bare foot. I highly recommend these - especially if you've tried every other brand and style and have decided *like me* that insoles just aren't "for your problem". Because these ARE. I really urge anyone with PF or Back Pain to give them a try! NO cons to this product. Will buy again and again.