To shrink my hats i pull out the loose thread
if its cotton then it should work
To shrink a knit hat, you can try washing it in hot water and then drying it on high heat. This can cause the fibers to tighten and shrink the hat. Be careful not to shrink it too much, as it may become too small to wear.
put it in the microwave also try a packet of crisps it goes all shrivelled and tiny Turn your oven to 300 degrees and put hat in. notice that the hat must have soaked in water for ten minutes before it enters the oven. Leave the hat in for 30 minutes. Take it out and wet in again. Just a sprinkle the second time. Put it on for half an hour then bam there you go. And dont forget to be naked while you are doing it. If the hat has any plastic it will melt in the oven, even when wet.
To shrink a knitted hat, you can try washing it in hot water and then drying it on high heat. This can cause the fibers to tighten and shrink the hat. Be cautious as this method may not work for all types of yarn and could potentially damage the hat.
You can indeed shrink a cotton baseball hat. If you wash the hat in very hot water and then dry it under the warmest safe setting it will shrink.
lids
The answer to your question is also a question: Why would you want to shrink a hat?!
1) Wash the hat with a small amount of laundry detergent in the sink. Don't put it in the washer/dryer! The washer/dryer would shred your hat to bits. The reason you need to wash it is that the hats have excess dye which will bleed into white fabric when wet, and you're going to need to get the hat wet numerous times in this process. So, wash your hat in the sink until most or all of the excess dye has dripped out of it.2) Preheat your oven to about 300 degrees Fahrenheit.3) Take a hot shower - as hot as you can make it without scalding yourself - with the hat on. Here, you're trying to get the hat to conform to the shape of your head. Try gripping it tightly so the inside mesh begins to bend backwards. You may need to experiment a bit in the mirror to see how you want it shaped while the hat is soaking wet. This will give you an idea of how to hold it tightly in the shower. After about 10 minutes of holding it - while it's on with the hot water running - to the shape you want it to be, your oven should be hot enough to cook your hat.4) Put the hat in the oven immediately. Don't worry, this won't melt it. The hat is 100% polyester, and as long as you keep it below 446 degrees Fahrenheit, it won't melt. That's why I recommend about 300 degrees Fahrenheit, a sufficient temperature to shrink the fabric and yet not do any damage. Leave it in the oven until it's dry.5) Take the hat out of the oven, let it cool off for a few minutes, and try it on. If it fits the way you like, then you're done. If not, you still need to shrink it some more. Read on.6) Get a large pot and fill it with water, enough to submerge the hat in. On the stove, bring the water to a rolling boil. Once the water's boiling, put the hat in. Leave it there for about 10 to 15 minutes. If you notice the water turning a reddish or any other color, don't panic; that's just more excess dye bleeding out. If, when you take the hat out, the dye has bled into the white fabric of the hat, wash it immediately (as you did in Step 1), as you do not want the dye to stain the white fabric.7) Get back in the shower, with the hat on, with hot water, as in Step 3. Hold it in the shape you want it to be again. Do this for about 10 minutes or so.8) Put it back in the oven at about 300 degrees Fahrenheit to dry it off. When it's dry, take it out, let it cool, and try it on.9) Repeat these steps until you can get it to shrink sufficiently to the shape of your head.10) Leave the hat on for an hour or two and work on the brim to get it to the shape you want.
If it is any kind of fitted hat and there is a sticker on it, I wouldn't recommend pulling it off. If it is not a fitted hat, I'd recommend taking the sticker off if there is one.
Most likely the Fitted Puma Monoline hat. I presume orange. http://www.shop.puma.ca/Men/Accessories/Best-Sellers/Fitted-Monoline-Hat/pna885922095347,en_CA,pd.html?cgid=61600
No a mans hat size is measured in inches and is universal to all hats.