How to exchange pictures small on big without paying extra?

How to upgrade quality of your portraits without paying extra?

All portraits are rectangular, but can be printed square at no charge i.e.:

2 11x14 = 1 16x20

2 11x14 = 1 14x14

16x20 squared to 16x16

20x30 squared to 20x20

24x30 squared to 24x24

40x30 squared to 30x30

supper landscape 20x24 to custom 16x24

1 20x24 = 2 16x20 =1 16x20 metallic

I B&W equal 2 colour portraits

1 metallic portrait equal 2 colour portraits

1 Sepia equal 2 colour portraits

1 portrait 5x7 = 4 thank you photos

1 print 5x7 = 2 prints 4x6

2 portraits 5x7 = 1 8x10 portrait

2 portraits 8x10 = 1 11x14 portrait

2 portraits 11x14 = 1 16x20 portrait

2 portraits 16x20 = 1 20x24 portrait

1 custom portrait 16x24 = 2 16x20 = 1 portrait 20x24

2 portraits 16x20 = 1 custom 12x18 portrait

Many other custom sizes available and each of them equal 2 portraits 1 step bigger.

Maximum exchange 20% of your pkg.

Grope gift photo and TY photo - exchange only from one negative to print from.