I need an images of my products to be enlarged for truck's wrap design ...
You may read an article about images here.
Below is a sample of typical question and answer:
Q: are the items pics good for the enlargement?
There are no "enlargement" for something with particular dimensions in digital photography. Dimensions of yours provided images are about 1.5 Megapixels ( about 20" by 14") which is good for WEB or to print on business card.
For high quality large photo you need 5-25 Mp image. In comparison my pocket iPhone shoots 13 Mp, but besides the dimensions there are other parameters of quality, so it's a deal for professional photographers. You may hire.
But practically we can print your images as they are and enlarge them with loss of resolution (quality), sharpness and fine details. In most cases it's enough for fleet wrapping seen from 10 feet distance.