A circle with inside and out side box-shadow have 1px extra border

Question

I have a circle which have both inside and outside box-shadow, but there is 1px unwanted border. Would anyone please help me to understand why this is happening with only circle and share the solution.

.wrapper {
  padding: 30px;
}

.circle {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  box-shadow: inset 0 0 0 16px #f9f9f9, 0 0 0 16px #f1f1f1;
  background: #32a500;
}

<div class="wrapper">
  <div class="circle"></div>
</div>

Answer 1

I think box-shadow: inset is messing up with border-radius.

While waiting for other solutions, you can always avoid using inset and apply instead a border, removing manually the 32px (16px + 16px) from the height and width of your div.

.wrapper {
  padding: 30px;
}

.circle {
  border-radius: 50%;
  background: #32a500;
  box-shadow: 0px 0px 0px 16px #f1f1f1;
  border: 16px solid #f9f9f9;
  width: 88px;
  height: 88px;
}

<div class="wrapper">
  <div class="circle"></div>
</div>

Answer 2

updated code with help of @Andrea Ligios

.wrapper {
  padding: 30px;
}

.circle {
  border-radius: 50%;
  background: #32a500;
  box-shadow: 0px 0px 0px 16px #f1f1f1;
  border: 16px solid #f9f9f9;
  width: 120px;
  height: 120px;
  box-sizing: border-box;
}

<div class="wrapper">
  <div class="circle"></div>
</div>