Hoping for some advice on baby sleeping bags. My baby is 6 months and her 0-6 months sleeping bags are becoming too short for her, but I've just tried putting her in 6-18 months Grobags and M&S bags and in both her head could fit easily through the neck opening. Has anyone else experienced this and have any recommendations for sleeping bags with smaller neck openings? Baby is very wriggly so I'm keen to stick with sleeping bags rather than move to blankets.