United StatesHow much should I charge for a A La Carte list?
I'm offering HD photos on glossy paper from a DSLR camera.
20x30 (P) panoramic
I think the answer as always is "it depends".
Business owners must first calculate how much it costs to stay in business and then, offer proceed to offer pricing which allows that business to operate at a profit.
For photographers, this means assessing revenue generated by clients per month. If the desired revenue for the business is $40k annually (a conservative value). Then the photographer would need make $800 per week. For example, if this value is spread out for an average of 2 portrait sessions per week, that means that somehow, each client is to bring in at least $400. How is this money to be made? This is up to you.
Be strategic about to hit your weekly/monthly goal.
Selling  4x6's at $5 each would get you there, but that's usually unrealistic for a portrait session.
After calculating the cost of doing business, its left to pricing strategies and customer incentives to meet that weekly/monthly goal.
This gets me wondering about pricing strategy, of which the possibilities are endless. I've asked a similar question here.
Denise; You are thinking as if you are selling boxes of soap: small is $X, large is $XXX. You are creating art, something that is unique to you. In addition to that what are you photographing? I have charged over $5,000 for one image and they didn't even get a print.
Read some of the great posts here on Shakodo and you will see that the price difference of print size is inconsequential compared to the value you are bringing to your customers.
I'm not sure what your question is. Are you asking how much you should charge a client for prints from something like a wedding? Are these fine art (landscape?) prints? Are you selling online? At shows?
We might be able to help you more if we have some more context.