[id^="tshirt_size"] {
  display: inline-flex; 
}

[id^="pullover_hoodie_size"] {
  display: inline-flex; 
}

[id^="crewneck_sweatshirt_size"] {
  display: inline-flex; 
}

[id^="zipper_hoodie_size"] {
  display: inline-flex; 
}

.col-md-4 {
  padding-right: 20px;
}