When I add images to my blog they became small😭💔

let's start with the basics:

1. What is the file size of the image's width and length in pixels? For example, an image size of 600x600 pixels (Is the size of an iTunes album cover). I believe you need to adjust the file size of the photo using a photo editing tool to achieve the desired dimensions for your page. another example, 100px by 100px is six times smaller in dimensions of an image of 600px by 600px. I hope you only need to adjust the image size to solve your problem.                                                                                                                                                           
2.  if not, the other answer is Using Width and Height Attributes in HTML:                                                                                                                                                                     <img src="image.jpg" width="300" height="200" alt="Sample Image">