Hello aspirant,

Hope you are doing great.

So, with regard to your query, you haven't mentioned the name of the exam about which you are referring about, so, from your profile I assumed that you talking about NEET exam.

The dimensions for Passport size photo is 10 to 200 kb and also for Post card size photo is also 10 to 200kb. You can edit the size of the photos in Adobe Photoshop or else you can also do it in the Paint itself. There are many YouTube videos available in YouTube to reduce the size of photograph virtually. You can checkout them as well.

Hope this helps you,

Good luck, thank you.