These cool longies are perfect for a boy or girl imo.  The colorway does have some purple but with all he blue, green, and brown...it would be great for a boy. The colorway is Wings of a Dragonfly dyed by Melissa of Family Pendragon.  The colorway is on Merino wool and the trim is Peruvian wool.

 

Measurements at rest are

 

Rise-17.5

Waist-15 *has lots of stretch*

Hips-17

Thigh-10

Inseam-9

 

These were made from my own design. 

 

The waistband is a 1x1 ribbing.  It eliminates the need for a drawstring.  The waistband can be folded down.

 

I can lanolize these for you but please allow for drying time.