jquery, get value from array of checkboxes

I have series of checkboxes, when the first is selected which has a value of 'Size 1", the corresponding fieldset will appear.  if unchecked/not checked, the corresponding fieldset will not appear and so on

I've been working with the toggle feature of jquery, but can't figure out how to get it to check that the boxes are checked/unchecked and if checked what is the value of those checked.  This is the code I have come up with:

$(document).ready(function(){
		$('#fs_flyer_desc1').hide();
		$('#fs_flyer_desc2').hide();
		$('#fs_flyer_desc3').hide();
});

$(document).ready(function(){
        $("#flyerSize[]").click(function() 
        {$("#fs_flyer_desc1").toggle($(this).is(':checked'))
        });
});

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which does work, but I can't figure out how to incorporate [if #flySize[] has a value of 'Size 1', show the matching fieldset,  if #flySize[] has a value of 'Size 2', show the matching field set, ] and so on

I know this is not the most efficient and elegant code, but I am just learning jquery, so this layout is making sense to my mind at the moment.

Test Code that I am working with:

<fieldset name="fs_flyer" id="fs_flyer">
<legend style="color:blue">Flyer</legend>
<table style="width: 100%">
<tr>
<td style="width: 188px"><label id="Label1">Sizes:</label></td>
<td><input id="flyerSize[]" name="flyerSize[]" type="checkbox" value="Size 1" />Size 1<br/>
<input id="flyerSize[]"  name="flyerSize[]" type="checkbox" value="Size 2"  />Size 2<br/>
<input id="flyerSize[]"  name="flyerSize[]" type="checkbox" value="Size 3"  />Size 3<br/>
			</td>
</tr>
</table>

</fieldset>

<fieldset name="fs_flyer_desc1" id="fs_flyer_desc1">
                <legend  style="color:maroon">Size 1 - Details</legend>
                <table style="width: 100%">
                    <tr>
                        <td style="width: 188px"><label id="lblFlyerDescription">Description:</label></td>
                        <td><textarea name="TextArea1" cols="30" rows="5"></textarea>
                        </td>
                    </tr>
                </table>

            </fieldset>
            <fieldset name="fs_flyer_desc2" id="fs_flyer_desc2">
                <legend  style="color:maroon">Size 2 - Details</legend>
                <table style="width: 100%">
                    <tr>
                        <td style="width: 188px"><label id="lblFlyerDescription2">Description:</label></td>
                        <td><textarea name="sizeOneDesc2" id="sizeOneDesc2" cols="30" rows="5"></textarea>
                        </td>
                    </tr>
                </table>

            </fieldset>
            <fieldset name="fs_flyer_desc3" id="fs_flyer_desc3">
                <legend style="color:maroon">Size 3 - Details</legend>
                <table style="width: 100%">
                    <tr>
                        <td style="width: 188px"><label id="lblFlyerDescription3">Description:</label></td>
                        <td><textarea name="sizeOneDesc3" id="sizeOneDesc3" cols="30" rows="5"></textarea>
                        </td>
                    </tr>
                </table>

            </fieldset>

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