Build select menus based on this array

Ok, so I want to create the following two select menus based on the following array:

<select name="size">
<option value="X879">small / medium</option>
<option value="7ABC">small / large </option>
</select>

<select name="quantity">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>

Array
(
    [size] => Array
        (
			[X879] => Array
			(
				[0] => Array
				(
		            [item_id] => 32
		            [value] => small
		            [id] => 2
		            [aid] => 10
				)
				
				[1] => Array
				(
		            [item_id] => 32
		            [value] => medium
		            [id] => 2
		            [aid] => 14
				)
			)
			
			[7ABC] => Array
			(
				[0] => Array
				(
		            [item_id] => 32
		            [value] => small
		            [id] => 2
		            [aid] => 10
				)
				
				[1] => Array
				(
		            [item_id] => 32
		            [value] => large
		            [id] => 2
		            [aid] => 130 
				)
			)
        )
 
    [quantity] => Array
        (
            [options] => Array
			(
				[1] => Array
				(
					num => 1
				)
				
				[2] => Array
				(
					num => 2
				)
				
				[3] => Array
				(
					num => 3
				)
			)
        )
)

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