Checkbox in ios is very small

The checkbox on IOS is very small. How can I have the same checkbox from PC/MAC on IOS?

1. 
   

   PC/MAC:

   
   

   

   
   


2. 
   

   IOS:

   
   

   

   
   

CSS

.radio, .checkbox {
   display: block;
   min-height: 20px;
   margin-top: 10px;
   margin-bottom: 10px;
   padding-left: 20px;
   vertical-align: middle;
}