Original 18 full plates dating from 1895. Almost 200. They all come in high resolution JPEG's, the file size is 76MB.The individual butterfly and caterpillar images range from quite small (less than 500 pixels) to very large (3000 pixels or so.) The full plates are each about 3850 by 5450 pixels. Do not be fooled by the size shown in this listing, much more detail is available from the CD. The images would be ideal to produce quality prints, great for scrapbookers!! Any basic quality photo inkjet printer will do just fine.