Change CheckBox image to custom image - html

Question

I have created a div with custom checkbox and i want to change the checkbox image by the custom image. and i have done it but i am unable to change the size of the image.Please help me.
Any help will be appreciated.
<div class="left">
<input id="Option" type="checkbox">
<label class="checkbox" for="Option"> </label>
</div>
And CSS which i have used.
.checkbox {
display: inline-block;
cursor: pointer;
font-size: 13px; line-height:18px;
}
input[type=checkbox] {
display:none;
}
.checkbox:before {
content: "";
display: inline-block;
width: 25px;
height: 25px;
vertical-align: middle;
background-color: rgb(248,183,51);
color: #f3f3f3;
text-align: center;
}
input[type=checkbox]:checked + .checkbox:before {
content: url("images/Tick.png");
text-shadow: 1px 1px 1px rgba(0, 0, 0, .2);
font-size: 15px;
}

Answer 1

You can do this without using images, just with simple characters and CSS, so you can make change on your custom checkbox just with adjusting font-size or changing color.
Please see the below example:
/* Base for label styling */
[type="checkbox"]:not(:checked),
[type="checkbox"]:checked {
position: absolute;
left: -9999px;
}
[type="checkbox"]:not(:checked) + label,
[type="checkbox"]:checked + label {
position: relative;
padding-left: 25px;
cursor: pointer;
}
/* checkbox aspect */
[type="checkbox"]:not(:checked) + label:before,
[type="checkbox"]:checked + label:before {
content: '';
position: absolute;
left:0; top: 2px;
width: 17px; height: 17px;
border: 1px solid #aaa;
background: #f8f8f8;
border-radius: 3px;
box-shadow: inset 0 1px 3px rgba(0,0,0,.3)
}
/* checked mark aspect */
[type="checkbox"]:not(:checked) + label:after,
[type="checkbox"]:checked + label:after {
content: '✔';
position: absolute;
top: 3px; left: 4px;
font-size: 18px;
line-height: 0.8;
color: #09ad7e;
transition: all .1s;
transform-origin: center;
}
/* checked mark aspect changes */
[type="checkbox"]:not(:checked) + label:after {
opacity: 0;
transform: scale(0);
transform-origin: center;
}
[type="checkbox"]:checked + label:after {
opacity: 1;
transform: scale(1);
transform-origin: center;
}
/* disabled checkbox */
[type="checkbox"]:disabled:not(:checked) + label:before,
[type="checkbox"]:disabled:checked + label:before {
box-shadow: none;
border-color: #bbb;
background-color: #ddd;
}
[type="checkbox"]:disabled:checked + label:after {
color: #999;
}
[type="checkbox"]:disabled + label {
color: #aaa;
}
/* accessibility */
[type="checkbox"]:checked:focus + label:before,
[type="checkbox"]:not(:checked):focus + label:before {
border: 1px dotted blue;
}
/* hover style just for information */
label:hover:before {
border: 1px solid #4778d9!important;
}
/* Useless styles, just for demo design */
body {
font-family: "Open sans", "Segoe UI", "Segoe WP", Helvetica, Arial, sans-serif;
color: #777;
}
h1, h2 {
margin-bottom: 5px;
font-weight: normal;
text-align: center;
}
h2 {
margin: 5px 0 2em;
color: #aaa;
}
form {
width: 80px;
margin: 0 auto;
}
.txtcenter {
margin-top: 4em;
font-size: .9em;
text-align: center;
color: #aaa;
}
.copy {
margin-top: 2em;
}
.copy a {
text-decoration: none;
color: #4778d9;
}
<form action="#">
<p>
<input type="checkbox" id="test1" />
<label for="test1">Red</label>
</p>
<p>
<input type="checkbox" id="test2" checked="checked" />
<label for="test2">Yellow</label>
</p>
<p>
<input type="checkbox" id="test3" checked="checked" disabled="disabled" />
<label for="test3">Green</label>
</p>
<p>
<input type="checkbox" id="test4" disabled="disabled" />
<label for="test4">Brown</label>
</p>
</form>
or you can check on CodePen as well: Custom Checkbox Without images
(Edited)
Custom Checkbox background-image property
Please check the following live example for a custom checkbox using background-image:
.checkbox {
display: inline-block;
cursor: pointer;
font-size: 13px; line-height:18px;
}
input[type=checkbox] {
display:none;
}
.checkbox:before {
content: "";
display: inline-block;
width: 25px;
height: 25px;
vertical-align: middle;
background-color: rgb(248,183,51);
color: #f3f3f3;
text-align: center;
}
input[type=checkbox]:checked + .checkbox:before {
background: url("https://cdn1.iconfinder.com/data/icons/windows8_icons_iconpharm/26/checked_checkbox.png") no-repeat center center;
text-shadow: 1px 1px 1px rgba(0, 0, 0, .2);
font-size: 15px;
background-size: 10px 10px;
}
<div class="left">
<input id="Option" type="checkbox">
<label class="checkbox" for="Option"> </label>
</div>
Please make sure that your image is exist in right path.
Also please consider you can re-position your background image by setting the horizontal and vertical position for background property as well.

Answer 2

Main thing I did was set backgrounds background-size to cover.
.checkbox {
display: inline-block;
cursor: pointer;
font-size: 13px; line-height:18px;
}
input[type=checkbox] {
display:none;
}
.checkbox:before {
content: "";
display: inline-block;
width: 40px;
height: 40px;
vertical-align: middle;
background-color: rgb(248,183,51);
color: #f3f3f3;
text-align: center;
}
input[type=checkbox]:checked + .checkbox:before {
background: url("https://cdn1.iconfinder.com/data/icons/windows8_icons_iconpharm/26/checked_checkbox.png");
text-shadow: 1px 1px 1px rgba(0, 0, 0, .2);
font-size: 15px;
background-size: contain;
}
<div class="left">
<input id="Option" type="checkbox">
<label class="checkbox" for="Option"> </label>
</div>