How to Control The Width of Select Tag

How to control the width of select tag?

USE style="max-width:90%;"

<select name=countries  style="max-width:90%;">
 <option value=af>Afghanistan</option>
 <option value=ax>Åland Islands</option>
 ...
 <option value=gs>South Georgia and the South Sandwich Islands</option>
 ...
</select>  

LIVE DEMO

How can I set the width of HTML select element, without considering the width of each option

you should use width attribute instead of max-width.
correct your code to below sample:

<select class="form-control"style="width:150px">
    <option value="1">option 1 </option>
    <option value="2">option 2sdsdsdsd</option>
    <option value="3">option 3</option>
</select>

How can change width of dropdown list?

Try this code:

<select name="wgtmsr" id="wgtmsr">
<option value="kg">Kg</option>
<option value="gm">Gm</option>
<option value="pound">Pound</option>
<option value="MetricTon">Metric ton</option>
<option value="litre">Litre</option>
<option value="ounce">Ounce</option>
</select>

CSS:

#wgtmsr{
 width:150px;   
}

If you want to change the width of the option you can do this in your css:

#wgtmsr option{
  width:150px;   
}

Maybe you have a conflict in your css rules that override the width of your select

DEMO

How to make select elements shrink to max-width percent style within fieldset

The problem

This isn't possible, at least if you only use max-width (see below for solution). <select>s are always a little bit tricky to style, as they're interactive content elements and form control elements. As such, they have to follow some implicit rules. For one, you cannot make a select less wide than one of its options when using max-width. Think of the following scenario:

+------------------------------------+-+
|Another entry                       |v|
+------------------------------------+-+
|Another entry                         |
|Select box, select anything, please   |
|Another entry                         |
|Another entry                         |
+------------------------------------+-+

Let's say that you want to squeeze this <select> - what will happen? The select's width will get lesser, until...

+------------------------------------+-+   +-----------------------------------+-+
|Another entry                       |v|   |Another entry                      |v|
+------------------------------------+-+   +-----------------------------------+-+
|Another entry                         |   |Another entry                        | 
|Select box, select anything, please   |-->|Select box, select anything, please  | 
|Another entry                         |   |Another entry                        | 
|Another entry                         |   |Another entry                        | 
+------------------------------------+-+   +-----------------------------------+-+ 
                                                   |
           +---------------------------------------+
           v
+----------------------------------+-+   +---------------------------------+-+
|Another entry                     |v|   |Another entry                    |v|
+----------------------------------+-+   +---------------------------------+-+
|Another entry                       |   |Another entry                      | 
|Select box, select anything, please |-->|Select box, select anything, please| 
|Another entry                       |   |Another entry                      | 
|Another entry                       |   |Another entry                      | 
+----------------------------------+-+   +---------------------------------+-+ 

And then the process will stop, as the <option>s wouldn't fit anymore. Keep in mind that you can't style <option>s or at least only a little bit (color, font-variant) without getting some nasty quirks. However, the border-box can be changed, if the select is prepared correctly:

The solution

Use a width value on the select. Yep, it's easy as that:

<fieldset style="background:blue;">
 <select name=countries style="width:100%;max-width:90%;">
  <option value=gs>South Georgia and the South Sandwich Islands</option>
 </select>
</fieldset>

Why does this work? Because the option will now recognize the width of the select correctly and won't force the select to have a implicit min-width. Notice that the width is absurd, as it is more than the max-width. Most browsers won't care and use the max-width in this case, as it provides an upper bound.

JSFiddle Demo (works in FF12, Chrome 18, IE9, Opera 11.60)

Edit

Wrapper based solution, this won't change the original width:

<fieldset style="background:blue;">
<div style="display:inline-block;max-width:90%;"> <!-- additional wrapper -->
 <select name=countries style="width:100%">
  <option value=gs>South Georgia and the South Sandwich Islands</option>
 </select>
</div>
</fieldset>

JSFiddle Demo (works in browsers listed above)

Change width of select tag in Twitter Bootstrap

This works for me to reduce select tag's width;

<select id ="Select1" class="input-small">

You can use any one of these classes;

class="input-small"

class="input-medium"

class="input-large"

class="input-xlarge"

class="input-xxlarge"

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