Is it possible to edit image size within markdown block?

Is there a way to edit the size of an image that is embedded within a markdown block?

Currently I'm trying to created a bulleted "to-do" checklist of many items to show which items have been completed and which are still outstanding.

That said, I've successfully added the images to the markdown block by using the reference style code found on the current cheat sheet: https://support.squarespace.com/hc/en-us/articles/206543587-Markdown-cheat-sheet

Reference-style:

![alt text][id]
[id]: /url/to/img.jpg "Title"

However, the images are now significantly way too big for the text. Is there a way to scale down the image size within the markdown block code?

Thanks in advance.