CSS circle border not showing - html

Question

I can't seem to get a border around a circle in CSS. I've double-checked to make sure the HTML classes were the same in CSS and tried various combinations of CSS properties. For some reason border: 4px solid #a569bd; is filling in the circle instead of becoming a border.
jsfiddle
/* circle icons for legend */
.layer-circle {
width: 8px;
height: 8px;
margin-top: 8px;
margin-left: 5px;
position: absolute;
display: flex;
border-radius: 50%;
}
.allbrew {
background-color: black;
}
.brewhunyrds {
background-color: black;
border: 4px solid #a569bd;
}
<b>Points of Interest</b>
<div class='poi-layer-options'>
<div class="layer-circle allbrew"></div>
<a class="layer-text" id="allbrew"><span>Breweries</span><br></a>
<div class="layer-circle brewhunyrds"></div>
<a class="layer-text" id="brewhunyrds"><span>Trail Breweries (100 yards)</span><br></a>
</div>

Answer 1

The code you posted doesn't correspond to what you describe (the jsfiddle does), but what you describe can happen if box-sizing: border-box; applies to that element (maybe caused by an according CSS rule with a * selector): Since in this case the given width includes the border and a border of 2 x 50% adds up to 100% (i.e. the full width), the border will completely fill the element.
To avoid that, add box-sizing: content-box; to the CSS rules for that element. This will add the border width to the element width / place the border outside the element.
Your fiddle modified accordingly: https://jsfiddle.net/sayxcfrn/