yeah, its around 61 cm and most if not all helmet its xl size. big ass head i have

wah...3XL also cannot fit? buying from china side can bring in without any issues ?
maybe helmet is long oval, which made ur ears folded? should go try lazer helmet

What helmet brand you tried?

I used to wear an LS2 modular size XL which was passed down from a friend so the pads were already quite worn, same case also very tight until lipat ear. Now I bought my Shoei Neotec 2, measure my head I'm only supposed to use a size L if follow Shoei charts, and the shell size of the L Shoei is larger than the XL size LS2! The LS2 chin bar would touch my chin while the Shoei still had loads of room, and my ears do not fold in when wearing the Shoei.

Do avoid China helmets as you don't know how safe they are.

i find the AGV Asian fit quite forgiving. perhaps you can try that....

also i rather get a KYT than some unknown from China...

do you know/ can you agak wht is your head shape?

if round, ls2 hjc is not right for you. these are oval or long oval try some shoei, like the noetec2, agv asian fit.

Can try other brand see, because like I said, my old LS2 helmet size XL, my chin touching the bar already, need to adjust the helmet to give it like 1cm clearance lol. If the problem is chin touching the bar then going larger won't really help because most manufacturers especially cheaper ones share one shell size with a large range of sizes (eg, L-3XL all same shell size) and just differ in the padding.

Don't think I can recommend the Shoei to you as it is a very premium priced helmet but I say if you have the budget you can go check them out. Or at least you can go to the store and try it on for size at least to get a feel of it. Go to a shop and try all the other brands helmet as well some brands might have larger shell sizes. Don't terus ask for the size which you THINK is correct, let the shop measure your head and let them decide what is a good size fit for you. When I bought my Shoei I thought I needed an XL or larger as the XL LS2 was tight until folding ear. The guy measured my head and told me I'm an L, and the shell size of my Shoei is quite noticeably larger than my old LS2 where my LS2 can fit comfortably in my rear box upright while the Shoei needs to be sideways at an angle to fit in the box, also the chin clearance is sooooo much roomier than the LS2.

Don't give up, just go try out more helmets! Maybe the more premium LS2 helmets like the Valiant may be larger, can try that and see

For Shoei, you can go to Bikeworld Klang(part of Autobacs) or Welly Shah Alam see.

Edit: Just checked back and you said your head is 65cm, for Shoei their largest XXL is supposingly up to 64cm only though. You sure you measured it right?

Edit 2: Just looked at Givi offering, the Voyager only comes in 1 shell size 

Caberg Sintesi seems to have 65cm XXXL, good luck finding it in Malaysia...

https://www.caberg.it/en/helmets/flip-up/sintesi

Ahhh thought you were looking for modular as i think i confused your comment with someone elses' about chin touching the helmet when close the chin guard

Anyway, HJC CL-17 seems to be popular, but doesn't seem to be common in Malaysia. Good luck.

https://motorgearexpert.com/best-motorcycle...-for-big-heads/
https://www.webbikeworld.com/extra-large-mo...-for-big-heads/

Some guys on Reddit are saying the Shoei XXL is truly larger than other helmet of the same size. You can try drop by some shops and try on the Shoei's if you don't mind the big price tag
https://www.reddit.com/r/motorcycles/commen..._big_heads_and/

dont prefer modular ok,
but jz go try the biggest neotec2 u can find, c how it feels.

cl-17 is available in msia, they brought in bcos got many marvel stuff on it.
according to review, it is slight round. so better go try n feel.

hjc distributor is nks, might wana go bek sentul n ask.. if they can order big size for u.
i think they only bring in til xl.  tho it hv 5xl size.

You can try go over to Welly Shah Alam search for Chris. I just asked him earlier and he say just come over he'll measure your head and see first. He also brings in HJC though not much models I think, more focused to Shoei. Go over and see how first ba. Going there is free, scared kena poison only become expensive