They are both 4"
Looks like 2 males to me, though the second one might be female. Check the thumbs of the front feet - do they have "pads" there? Males have these to hold on to females during breeding.
Founder of Frogforum.net (2008) and Caudata.org (2001)
There you go, both males. Females are almost round in comparison to males, when viewed from above.
Founder of Frogforum.net (2008) and Caudata.org (2001)
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