How to Get Equal Width of Input and Select Fields

How to get equal width of input and select fields

Updated answer

Here is how to change the box model used by the input/textarea/select elements so that they all behave the same way. You need to use the box-sizing property which is implemented with a prefix for each browser

-ms-box-sizing:content-box;
-moz-box-sizing:content-box;
-webkit-box-sizing:content-box; 
box-sizing:content-box;

This means that the 2px difference we mentioned earlier does not exist..

example at http://www.jsfiddle.net/gaby/WaxTS/5/

note: On IE it works from version 8 and upwards..

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Original

if you reset their borders then the select element will always be 2 pixels less than the input elements..

example: http://www.jsfiddle.net/gaby/WaxTS/2/

How to make input and select to be same width in css

Demo Fiddle

You should ideally separate style from content, so in your CSS include:

input, select{
  width:100%;
  box-sizing:border-box;
}

nb. demo fiddle without box-sizing set

And you need to use box-sizing:border-box in order for sizing to take into account any browser specific or set margin/padding/borders. Here's a handy read on the subject.

Box-Sizing on MDN:

The box-sizing CSS property is used to alter the default CSS box model
used to calculate widths and heights of elements. It is possible to
use this property to emulate the behavior of browsers that do not
correctly support the CSS box model specification.

border-box

The width and height properties include the padding and border, but
not the margin. This is the box model used by Internet Explorer when
the document is in Quirks mode.

Set equal width of select and input elements in CSS

Select sizing differs from inputs sizing because of different box-sizing. Input has box-sizing set to "content-box" while select has box-sizing set to 'border-box'.

The solution is to specify box model like this:

input, select{
  box-sizing: border-box;
  -moz-box-sizing: border-box;
  -webkit-box-sizing: border-box;
}

CSS: making the select field width and height same as all other input fields?

problem is with padding when you are removing the padding width of inputs are same.Otherwise you can use box-sizing.When use this padding will be subtracted from the width.

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<div class="form-group"><input type="text" class="form-control newins" id="coll" placeholder="Collection"></div> <div class="form-group"><select id="len" class="form-control newins" ><option value="">Length</option><option value="1">1</option><option value="2">2</option><option value="3">3</option></select></div>

Input and select fields have different lengths

It has to do with box sizing - whether it includes border, padding and margins in width or not. Your problem would be solved if you had set border-box in box-sizing:

.adapterInput * {
    box-sizing: border-box;
}

How to give equal width for all the fields in the form with validations?

JSBIN

Just add display: inline-block and specify min-width to label element

.form label {
    display: inline-block;
    margin-left: 10px;
    color: #999999;
    min-width: 110px;
}

Select inputs and text inputs in HTML - Best way to make equal width?

The solution is to specify box model for form elements, and browsers tend to agree most when you use border-box:

input, select, textarea {
  -webkit-box-sizing: border-box;
     -moz-box-sizing: border-box;
          box-sizing: border-box;
}

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There's normalize.css project that aggregates such tricks.

Why the input and the select do not get the same width?

This is because with an <input>, the border and padding is added on to the width (like with most other elements). With a <select>, the border and padding is included in the width, just like in the old IE quirks mode.

You can get round this by increasing the width to take account of this, if you know the width in pixels:

input  { width: 200px; padding: 10px; border-width:5px; }
select { width: 230px; padding: 10px; border-width:5px; }

Or (if you can rely on browser support) you can use the new CSS3 box-sizing property to make them behave consistently, and draw padding and border outside of the element width:

input, select {
  width: 200px;
  padding: 10px;
  border-width:5px;
  -webkit-box-sizing: content-box; /* Safari/Chrome, other WebKit */
  -moz-box-sizing: content-box;    /* Firefox, other Gecko */
  box-sizing: content-box;         /* Opera/IE 8+ */
}

Alternatively, you can set box-sizing to border-box to make the inputs behave like the selects, with padding drawn inside the width of the box.

Tested in Chrome, IE8, FF

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