I use the Swift FX mask. The top strap is adjustable. You can pull on the end until it is snugged down a bit, with a finger width of space between the top strap and the top of your head. With your small head, you might have a couple of finger widths or more of play. It doesn't really matter where the top strap drapes on your head. Let it flop around and just forget about it. The crucial pieces are the back straps. Adjust and tighten these until they are snug, yet comfortable against the back of your head. Draw your short hair up and over the back strap to anchor it. Got your pillows on straight with the rough edge up? Is it loose enough on your nostrils to be comfy? Good. You're all set. Take a deep breath, turn on your machine and lay back. Sleep tight!
Thank you for all the help. It looks like it going to be trial and error. I've tried with the chin strap on first, on second, without the chin strap, haven't found the combination that allows me to sleep without waking up to adjust the mask. I'll keep trying. Sleeptech, I can deal with stretched straps, that's what needle and thread are for.
I've tried 4 different chin straps: one home made with Tensor bandage and some sewing, one an on line generic that sells for $10 or less, one that I bought locally at 2 for $6 (hole cut out for the ear), and most recently the Breathewear Halo. It is probably the most secure of them all. For me putting the chin strap on last works the best. You could try taping the straps with some paper type medical or first aid tape (3M Nexcare). I use it to tape my mouth shut. It is not too hard on the skin.
I've had a few patients make their own straps, which is an excellent idea. As long as you are happy with it then great! I for one won't be sorry if ResMed miss out on a few dollars. Unfortunately most people don't have the skills. And from ResMed's point of view it wouldn't hurt them to make a product that actually works properly without requiring you to do the work for them. I much prefer the DreamWear intranasal mask, and so do my patients.
I am using the Swift FX, and have a very small head. The silicone part is down to the last notch, but the Velcro strap across the back had to be modified to be small enough.
Sometimes when this happens it's because the rubber strap is sitting too far forward on the head, which means it is travelling less distance and so it is shorter. You could try pulling it further back on your head and see if it stays put - this has worked for some of my patients. Also, you can get a version of the swift FX called the Bella, which hooks around your ears and doesn't go across your head at all. I would imagine this might get rather sore by the end of the night but, hey, could be worth a shot.