Generated by SassMeister.com.

SassMeister-input-HTML.html

<div class='text-size-tiny'>Tiny</div>
<div class='text-size-small'>Tiny</div>
<div class='text-size-standard'>Tiny</div>
<div class='text-size-large'>Tiny</div>
<div class='text-size-extra-large'>Tiny</div>

SassMeister-input.scss

// ----
// libsass (v3.2.5)
// ----

    @each $size, $px in (tiny:0.5em, small: 0.8em, standard: 1em, large:1.5em, extra-large:2em) {
            .text-size-#{$size}{
                font-size : $px;
            }
    }

SassMeister-output.css

.text-size-tiny {
  font-size: 0.5em;
}

.text-size-small {
  font-size: 0.8em;
}

.text-size-standard {
  font-size: 1em;
}

.text-size-large {
  font-size: 1.5em;
}

.text-size-extra-large {
  font-size: 2em;
}

SassMeister-rendered.html

<div class='text-size-tiny'>Tiny</div>
<div class='text-size-small'>Tiny</div>
<div class='text-size-standard'>Tiny</div>
<div class='text-size-large'>Tiny</div>
<div class='text-size-extra-large'>Tiny</div>