Dimensions Of A Standard "1/2 Sheet Baking Pan"?
Decorating By Naty Updated 21 Oct 2010 , 7:38pm by CWR41
I think that you will find that many people have their own standards.
Which I don't understand. A 1/2 sheet is a half sheet. And someone can't really just "make up" whatever they want to call a half sheet. A cup of milk is 8 ounces. Someone can't just come along and say "well my cup is only 6 ounces, so that's what I call a cup." 
I read one thread in which a CC'er said her oven only held a 11x15 "....so that's what I call my full sheet." HUH?????? Setting 'standards' and trying to do price comparisons on full-sheets vs. full-sheets and someone is basing it on how big their personal home oven is?????
dont' get it. dont' get it at all.
I use a 9x13 for a 1/4 sheet. I use 2-9x13's as a half, thus making it 13X18. I don't have a 1/2 sheet pan.
I would not consider an 11x15 a half.
I was more meaning that there is not an "official" industry standard, so some may do as you posted.
Stephanie
I can see the confusion though. Where I work, we use the pan inserts/extenders and bake 2 half sheets at a time measuring out at about 11x16. We call that our "half sheet". We bake 4 quarter sheets at a time and only end up being like an 8x12. Places that bake in bulk have different dimensions, but as Debi stated.....12x18 is a true half sheet.
was more meaning that there is not an "official" industry standard, so some may do as you posted.
Actually there is... over the years people have just added different size pans to the market.
Here is a link with a good post from IndyDebi about what the full sheet/half/quarter sizes were used in bakeries.
http://cakecentral.com/cake-decorating-ftopict-628706-.html
There is also someone else who has posted a link a few times (but i can't find a post with it now) to the history of sheet cakes and their sizes. Maybe someone else will remember who posted it or have the link to it.
Also... i'm not trying to argue over the extra inch you have stated is your half sheet. The extra inch one way or the other isn't going to make that big of a difference, but when you see people start using an 11x15 as a full sheet instead of closer to the standard of 18x24, there's a HUGE difference there.
There is also someone else who has posted a link a few times (but i can't find a post with it now) to the history of sheet cakes and their sizes. Maybe someone else will remember who posted it or have the link to it.
Hi Leily--If you're referring to my post about full sheet size, it wasn't really the history of sheet cake sizes (although IndyDebi commented: "great history on cake sizes! 
"). I didn't jump in with the info because this thread was about 1/2 sheets, but I'll paste what I had posted about full sheets in case it's helpful:
A commercial Bun pan is 18" x 26" (outside measurement), and because they are tapered for nesting or making them stackable, the inside measurement is 16.5" x 24.5".
A commercial full sheet is 16" x 24". They are baked in 16" x 24" bakeable cardboard trays that fit into the Bun pans (flat surface portion) which are used during baking for support and handling purposes.
A true commercial full sheet (16" x 24") serves 96 (unit wt. 106-124 oz.).
If this size pan doesn't fit in your oven, and you are baking two 12" x 18" (54 serving) half sheets, they would serve 108 total.
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