JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
    
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
     <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    <div class="item"></div>
    
    <!-- add fill dummys here. The number of dummys must be the number of possible columns minus one -->
    <div class="item flex-dummy"></div>
    <div class="item flex-dummy"></div>
    <div class="item flex-dummy"></div>
    <div class="item flex-dummy"></div>
    <div class="item flex-dummy"></div>
    <div class="item flex-dummy"></div>
    <div class="item flex-dummy"></div>
    <div class="item flex-dummy"></div>
    <div class="item flex-dummy"></div>
    <div class="item flex-dummy"></div>
    
</div>

CSS

.container {
    display: flex;
    display: -webkit-flex;
    display: -moz-flex;
    justify-content: space-around;
    -webkit-justify-content: space-around;
    -moz-justify-content: space-around;
    flex-flow: row wrap;
    -webkit-flex-flow: row wrap;
    -moz-flex-flow: row wrap;
}

.flex-dummy {
  height: 0 !important;
  padding-top: 0 !important;
  padding-bottom: 0 !important;
  margin-top: 0 !important;
  margin-bottom: 0 !important;
}

.container .item { width: 130px; height: 180px; background: red; margin: 0 1% 24px; }