More about possible clothing for Carl:

Underwear: The version Carl wears is a summer suit made in cotton. The short legs were convenient for wearing with long stockings and knickers which were standard for American boys in the 1910s. The cream color was standard for union suits. This suit does not have tabs or buttons for holding up pants or stockings. In winter time Carl would have had a union suit with long sleeves and long legs.
The reinforced section around the waistline of Carl underwaist has two rows of extra taped-on buttons for the attachment of trousers. So that if Carl would grow a bit taller, the lower set of buttons could rather be used than the upper set.
Carl's stocking supporters could be black as well as white.

Suits: Carl at age 7 was going to school, but he would have been among the youngest children at school. Age 7 was a kind of in-between age. Boys at age 7 might wear both styles younger boys wore and older boys wore. Younger boys might wear rompers, Oliver Twist suits, or tunic suit. Older boys would weak knicker suits with proper knickers. Boys at age 7 might wear tunic suits, although they were more common for younger boys. We see realtively few boys wearing tunic suits to school in the 1910s, even though they were a popular style. Boys wearing tunic suits at age 7 and 8 commonly wore sailor styles. Carl could have also worn a knicker suit like his older brother. This is a style a younger boy wold not have worn.
Younger boys up to 10 years wore blouses (without suit jackets) with knee pants during the summer. Another favourite was the sailor suit.
In the 1910s boys still commonly wore suits to school. Sailor suits were still popular, although only worn by a minority of boys to school.
The bloomer knickers were the same pants worn with tunic suits at the time.
We are not entirely sure how bloomer knickers were suspended. A possibility was an additional body part or an inside waistband with button holes. The bloucing at the leg was done by drawstrings in the leg hem.
Older boys were mostly wearing proper knickers, but we note that younger boys were wearing both knee pants and bloomer knickers. Short pants were not yet common.
Apparently knee pants, which had been so common, were now increasingly being seen as only appropriate for younger boys (so far we haven't found a reason for this phenomenon).

Collars: Large collars were still popular for younger boys, but not as large or fancy as in the 1900s. Collars were done in a modified sailor style and with a very simple loose tie.

Stockings/Socks: Boys Carl's age might wear socks during the summer. Somewhat older boys were likely to wear long stockings even in warm summer weather.

Mehr über mögliche Kleidung für Carl:

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