After selecting your favorite pictures (photos, images*) you have to downsize them for using in the frames of your choice. You can use editing software like Photoshop for this. I used a similar free (OpenSource) product named Gimp
I will show you how to downsize your picture to the correct frame size.
- Start Gimp
- Open a new empty document selecting A6(300dpi) under template, change Width & Height to 1050 x 1500 (in pixels) and click Ok. Now you have a blank document in the correct printing format of 9x13cm (US format 3R(L)). Probably you see only this document. To edit your document you need the Gimp Toolbox and Layers box. Open these boxes by selecting Toolbox and Layers under menu Windows at the top of your empty document.
- Open your favorite picture in a new window by selecting it under File>Open. With the Rectangle Select Tool selected (first button in Toolbox) select your picture (or part of it). Edit>Copy/Paste as New Image. Resize your New image using the Scale image option in menu Image. Scale it to width/height 240x240 pixels (for Frame '20x20') ) and X/Y size 300x300 pixels/in. Do not forget this 300dpi size! Select the rescaled photo with the Rectangle Select Tool and Copy > Paste it in the empty document you created in step 2.
- Repeat step 3 for other pictures you like to add to the empty document. With the Move Tool (12th button in Toolbox) you can move and place the selected pictures in the empty document. E.g. you can place a maximum of 4x6 = 24 photos of 240x240px (2x2cm) in the empty document.
- When finished, rename your document and save it. It is saved as Gimp (.xcf) so you can reuse it. For using it for a Printing Service you have to save your document as a .jpeg image. For this you use the Export As.. option in menu File. Give your document a name and select in All Export Images the JPEG image option. Save it.
- Go to a Printing Service with your saved JPEG image.
You can use several pictures in one 9x13 cm (US format 3R(L)) JPEG image.
Frame 20x20 = 240x240 pixels
Frame 20x30 = 240x360 pixels
Frame 30x20 = 360x240 pixels
Frame 30x30 = 360x360 pixels
When you have received the pictures from the printing service cut them and put them in (the top of) your Frame(s). Depending on the Frame material (Plastic, Precious Metal, etc.) you put some extra white photo material behind your photo to fix it in the Frame. Or you place on each side of the Frame a photo.
Wear and show your favorites!
And the next time? Show some other of your favorites. Use your imagination and have fun!
* Images used as examples are licensed under the CC0 license.