Big enough to get a good grip, even though gloves. Nice metal shaft. Bright handle so it doesn't get lost in the bottom of the toolbox. Only catch is that some wheels - especially on vintage bikes - don't have enough room between the valve stem and the hub. The brake drum on my CB175 front wheel is too close to the valve stem, so this tool can't fit in the space. Just a touch too long. Other than that, it does the job and is comfortable in the hand.