Current photos are JPG and I need the original!?

Ok..my brothers wedding was last month and everyone had their digital cameras snapping away. I recieved hundreds of photos in my inbox however they are JPG. I want to upload them to walmarts photo centre to print them off but because it's JPG, the images are approx 50-100kb in size, which is too small to print off a good quality 4x6. Without the original pictures, is there anyway to convert my current jpgs to a larger file/format, so that it would be suitable for printing? Thanks.

You'll find that when the pics have been emailed to you the "other end" has used the windows image reducer to make them more manageable and easier to email ... the only way is to get your Favs resent in their original size or get someone to make you a disc and mail it to you

There is nothing you can do to convert them larger. The picture will look terrible. You just have to get them before they were changed.

Those are small, about thumbnail size. Contact the family members and see if they will send you the larger sizes.