Hi, Im using the 2mg ring, and i think its quite large. Now depending how big some of us are up there could be tight or could be snug... I think we are designed to stretch up there, but as we are dry we notice the stretching, Im still on the first ring, so i have another month to go before i get another one.. its is supposed to release 7.5 something a day which is less that the 10 vagifem if your using it every day. strangly enough it actually in my opinion holds you apart a bit, so your not chaffing up there, but could be just me... I spoke to the doctor and told him initially it was driving me nuts, and that i went as long as i could and took it out, he said yes that fine. he said do whatever your happy with... and taking it out and putting it back i would think is no more a risk of infection that other things that may be used up there, not being to desciptive lol.. i felt the vagifem was not dissolving properly or how it adheres to my inside i was alergic to.. As for the racing heart i have had this but found i didnt have it on the estring, and i found i didnt notice it if i dont insert anything near bedtime, hence i like the daytime insertions, keep myself busy and it wears off, and eventually just dissappears as my body has ajusted..I had the most horrendous sore stomach, and stopped using vagifem for that reason, but i was using it every day. from when i first started to use the ring to now im a lot plumper up there. i have had one or two iffy days when i thought am i getting an imbalance, then i used a bit of yes lubricant(water based one) just to balance me up, before it get out of hand. worked great... the ring does not have a cord on it and i dont push it far up, i just insert it and let it go where it wants. dont be put off by its size im a very petite person, and petite up there, so if i can do it anyone can... the ring goes sideways that why it fits all, does not sit on the cervix, and release over an area, where the vagifem releases in one spot... Phew!!! hope i covered it and helped you.