Sizing

<div class="velin-w-25">Width 25%</div>
<div class="velin-w-50">Width 50%</div>
<div class="velin-w-75">Width 75%</div>
<div class="velin-w-100">Width 100%</div>
<div class="velin-w-auto">Width auto</div>

<div class="velin-mw-100">Max width 100%</div>
<div class="velin-mw-sm">Max width sm (540px)</div>
<div class="velin-mw-md">Max width md (720px)</div>
<div class="velin-mw-lg">Max width lg (960px)</div>

<div class="velin-h-25">Height 25%</div>
<div class="velin-h-50">Height 50%</div>
<div class="velin-h-100">Height 100%</div>
<div class="velin-h-auto">Height auto</div>
<div class="velin-vh-100">100vh</div>
<div class="velin-min-vh-100">Min 100vh</div>

<div class="velin-ratio velin-ratio-1x1">1:1</div>
<div class="velin-ratio velin-ratio-4x3">4:3</div>
<div class="velin-ratio velin-ratio-16x9">16:9</div>
<div class="velin-ratio velin-ratio-21x9">21:9</div>