Generated by SassMeister.com.

SassMeister-input-HTML.haml

.btn-group.pull-right.green-button
  %span.rounded-number
    %span 3
  %span.button-text
    Create Campaign
    %span.caret

SassMeister-input.scss

// ----
// Sass (v3.3.4)
// Compass (v1.0.0.alpha.18)
// ----

.btn-group, .btn-group-vertical {
position: relative;
display: inline-block;
vertical-align: middle;
}
.btn {
font-weight: normal;
text-align: center;
cursor: pointer;
white-space: nowrap;
font-size: 14px;
line-height: 1.428571429;
}

.btn-group > .btn:first-child {
margin-left: 0;
}

.btn-group > .btn, .btn-group-vertical > .btn {
position: relative;
float: left;
}

.btn-primary {
color: white;
background-color: #98c665;
border-color: #5d932a;
}
.btn {
display: inline-block;
margin-bottom: 0;
font-weight: normal;
text-align: center;
vertical-align: middle;
cursor: pointer;
background-image: none;
border: 1px solid transparent;
white-space: nowrap;
padding: 6px 12px;
font-size: 14px;
line-height: 1.428571429;
border-radius: 4px;
-webkit-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
-o-user-select: none;
user-select: none;
}
input, button, select, textarea {
font-family: inherit;
font-size: inherit;
line-height: inherit;
}
button, html input[type="button"], input[type="reset"], input[type="submit"] {
-webkit-appearance: button;
cursor: pointer;
}
button, select {
text-transform: none;
}

.btn .caret {
margin-left: 0;
}
.caret {
display: inline-block;
width: 0;
height: 0;
margin-left: 2px;
vertical-align: middle;
border-top: 4px solid;
border-right: 4px solid transparent;
border-left: 4px solid transparent;
}


// overrides

.green-button {
  background-color: #98c665;
  border: 1px solid #5d932a;
  border-radius: 50px;
  overflow: hidden;
  position: relative;
  height: 35px;
  padding-left: 35px;
  .rounded-number {
    position: absolute;
    border-radius: 50px;
    width: 35px;
    height: 35px;
    display: inline-block;
    border-right: 1px solid #5d932a;
    left: 0;
    top: 0;
    span {
      width: 100%;
      color: #fff;
      font-weight: bold;
      font-size: 25px;
      line-height: 35px;
      display: inline-block;
      text-align: center;
    }
  }
  .button-text {
    display: inline-block;
    padding: 0 11px;
    line-height: 35px;
    color: #fff;
  }
}

SassMeister-output.css

.btn-group, .btn-group-vertical {
  position: relative;
  display: inline-block;
  vertical-align: middle;
}

.btn {
  font-weight: normal;
  text-align: center;
  cursor: pointer;
  white-space: nowrap;
  font-size: 14px;
  line-height: 1.428571429;
}

.btn-group > .btn:first-child {
  margin-left: 0;
}

.btn-group > .btn, .btn-group-vertical > .btn {
  position: relative;
  float: left;
}

.btn-primary {
  color: white;
  background-color: #98c665;
  border-color: #5d932a;
}

.btn {
  display: inline-block;
  margin-bottom: 0;
  font-weight: normal;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  background-image: none;
  border: 1px solid transparent;
  white-space: nowrap;
  padding: 6px 12px;
  font-size: 14px;
  line-height: 1.428571429;
  border-radius: 4px;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  -o-user-select: none;
  user-select: none;
}

input, button, select, textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

button, html input[type="button"], input[type="reset"], input[type="submit"] {
  -webkit-appearance: button;
  cursor: pointer;
}

button, select {
  text-transform: none;
}

.btn .caret {
  margin-left: 0;
}

.caret {
  display: inline-block;
  width: 0;
  height: 0;
  margin-left: 2px;
  vertical-align: middle;
  border-top: 4px solid;
  border-right: 4px solid transparent;
  border-left: 4px solid transparent;
}

.green-button {
  background-color: #98c665;
  border: 1px solid #5d932a;
  border-radius: 50px;
  overflow: hidden;
  position: relative;
  height: 35px;
  padding-left: 35px;
}
.green-button .rounded-number {
  position: absolute;
  border-radius: 50px;
  width: 35px;
  height: 35px;
  display: inline-block;
  border-right: 1px solid #5d932a;
  left: 0;
  top: 0;
}
.green-button .rounded-number span {
  width: 100%;
  color: #fff;
  font-weight: bold;
  font-size: 25px;
  line-height: 35px;
  display: inline-block;
  text-align: center;
}
.green-button .button-text {
  display: inline-block;
  padding: 0 11px;
  line-height: 35px;
  color: #fff;
}

SassMeister-rendered.html

<div class='btn-group pull-right green-button'>
  <span class='rounded-number'>
    <span>3</span>
  </span>
  <span class='button-text'>
    Create Campaign
    <span class='caret'></span>
  </span>
</div>