>>121807No. He can widen them by sewing in some more leather somewhere on the side, or sewing the leather to the sole a few mm further out.
The length of the shoe is limited by the outsole.
If it's less than ~2mm (the thickness of a pair of socks), you can try the following (in descending order of risk to your boots):
>clip toenails>lace shoes tight in the back, loose in front>make a surgeon's knot between the last lace loops and the first tightening hooks (this pushes your heel further back, giving you more room in front)>stretch the leather: wear 2-3 pairs of socks, put on shoes, soak them in water, slavsquat (pic related) for as long as you can a few times, walk around for as long as you can. Then completely stuff the shoes with newspapers and let them dry. 