The key question remaining is stretched how much? If they are a little tight, no problem. Certainly a shoe stretcher would work. For low tech, I have soaked shoes in water and stuffed them full of newspapers to dry. That was followed by an ample amount of oil. For high value items, I would go with the shoe stretcher
Good decisions come from experience. Experience comes from making bad decisions. Mark Twain
Hi Mike! First post/reply here on Permies though I've been lurking for years, finally feel I can add a bit of value to a thread.
When stretching leather, utilize a 50/50 mix of isopropyl alcohol and water to saturate and soften the material prior to applying force. The alcohol will evaporate faster than simply using water. Also, if you are using any type of stretcher that will contact the exterior of the skate, protect the leather with a rag with a bit more of the liquid mix. This is what we use in our practice in place of shoe stretch liquids/sprays that can be purchased.
It was not as easy as I thought but we got it. The unforeseen problem is that the boot was tall. So I had to jam it in as far as I could and tie up the laces to hold it in before spreading it. Luckily the "tightness" issue was far enough back on her foot that the spreader was able to spread it enough. So it worked but to do it correctly you'd need a different (not invented yet?) style of stretcher that can go down in a boot and allow you to crank it open from above the ankle instead of behind and just above the heel.
If it's real leather, we always used baseball glove oil. It might darken the leather a bit but your shoe, skate, boot, etc. will stretch to fit. Go lightly with it as it can allow the leather to stretch so much it becomes too big.
Just my 2 cents...
Money may not make people happy but it will get you all the warm fuzzy puppies you can cuddle and that makes most people happy.