Product attribute images

[vmax]

[hi guys im trying to find the correct setting to get all my attribute images to be the same height

i have tried adjusting the settings under admin>configuration>images but nothing seems to control this, i have tried a google search as well as searching zencart.com and found a few people ask the same question but they never responded if they sorted it or how
i basically want them the light up in a row rather than being all different heights
if its relevant i have image handler mod installed but can see anything there either

see screen shot and product page so you can see what i am referring to
and thanks for taking the time to read this

https://www.cjscreativecrafts.com/tr...traw-p-35.html