A survey of all the hats we saw during the second week this month, October 8 to October 14:
Sunday, October 8: Queen Elizabeth attended Sunday Service at Krathie Kirk in a repeated turquoise straw hat with feather trim. The Duchess of Cornwall was also in attendance in her taupe beret percher with pheasant feather trim.
Monday, October 9: Queen Sonja attended the opening of parliament in Oslo in a repeated black felt cloche hat with upturned brim printed with diamond shapes on the underside.
Tuesday, October 10: Queen Máxima repeated her natural straw picture hat with upswept vertical ‘slice’ brim for her and the king’s first day of state visit to Portugal.
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Embed from Getty Images
Tuesday, October 10: Prince Fumihito and Princess Kiko of Akishino attended the closing of the National Sports Festival in Ehime. Princess Kiko wore what looks to be a new hat with wider than usual brim and pleated cafe-au-lait hued hatband.
Wednesday, October 11: Queen Máxima repeated a silk floral headpiece for Day 2 of the Dutch state visit to Portugal.
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Wednesday, October 11: Prince Fumihito, Princess Kiko and Princess Hisako joined the Empeor and Empress for a memorial concert at the Imperial Palace. The princesses wore navy and black brimless hats.
Wednesday, October 11: Princess Akiko of Mikasa attended the 15th commendation ceremony of People’s Self-Defense Force Officers in a sharp navy trilby variation with upturned front brim and wide cream hatband. The same day, Crown Princess Masako attended a memorial in Tokyo for victums of industrial accidents. She wore a navy Breton hat.
Thursday, October 12: Princess Beatrix attended the 250th anniversary celebration of the “Society for the Rescue of People from Drowning” in Amsterdam in a large burgundy straw bumper hat.
Thursday, October 12: Princess Astrid of Belgium joined the Duke of Cambridge for the New Zealand National Commemoration for the Battle of Passchendaele. Her repeated hat in black felt features a flat crown, wide cartwheel brim and slim hatband.
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Embed from Getty Images
Thursday, October 12: Infanta Elena donned her trusty straw fedora for a National Day military parade in Madrid
Thursday, October 12: Queen Máxima repeated a pale pink striped abacca headpiece with silk flowers for the final day of the Dutch state visit to Portugal
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Embed from Getty Images
Thursday, October 12: Princess Alexandra repeated her cream straw hat with domed crown, stacked straw hatbands, tulle veil wrap and feather trim to open a learning and development centre at Holy Cross Hospital in Haslemere.
Saturday, October 14: Princess Beatrix opened the renovated windmill “Googermolen” in Roelofarendsveen in a gold straw bumper hat.
Royal Hats 
Another vote from me for Maxima’s slice hat on October 10th, and I’ll add that THIS is how her hair needs to be under those large tilted hats, not scarcely visible as in the other slice hat she wore this week. (Cranberry as Bristol said? Magenta? I’ve actually forgotten!)
I love the return of the 2016 Prinsjesdag golden slice hat, and I even like the monochrome look of her whole ensemble this time! I did like the floral fascinator Máxima wore on 11 October, but I attribute it more to her outfit, which is paired very well with. Finally, I was happy to see Astrid’s Dior New Look hat once again.
Beatrix’s burgundy cake hat is a lovely colour. Maxima’s huge slice natural straw hat is the way to do big hats for a royal engagement (compared with the cranberry one recently which obscured her face and vision)
Queen Maxima’s brown slice (love the band detailing) and the abacca headpiece (but definitely not the other head piece!). And, for sentimental reasons, Princess Astrid’s hat.
My favorites from this week:
October 10: Queen Máxima – natural straw picture hat
October 12: Princess Beatrix – burgundy straw bumper hat
Standouts for me in this bunch include
1. the DoCornwall in her spiky feather hat- glad we’re seeing those back out.
2. QMax, I loved that whole look-I usually hate the no-color looks, but she looks so good in that beige slice hat and dress. Her makeup there is especially lovely as well.
3. QMax again in the Oct. 12 Pale pink headpiece. So sculptural and fun!
I’ll vote for Princess Beatrix in her signature look in the beautiful burgundy color.
Bonjour, je suis très heureuse de vous retrouver, merci du travail remarquable que vous aviez préparé pendant votre absence. Voici mes choix pour ces deux semaines: le 3: Victoria et Marie; le 4:Maxima; le 5: Sophie de Wessex, le 10: Maxima et le 11 : Maxima.
Beatrix looks wonderful in her signature hats
It’s interesting to me that Maxima wore the silk flower headpiece and the other, flower-like piece on the same trip. I think the proximity highlights just how clunky the abacca abstraction is. That section that breaks off from the flowery shape to limpidly drift over the top of her head is just plain sad. But of course both are a sideshow compared to her slice. That one wins the week for me.
It’s nice to see Beatrix in a narrower hat for a change (the last one in the post), but also nice to see that it still looks very Beatrix.
Oct 10: Q Maxima, straw picture hat
Oct 12: Q Maxima, blush abacca headpiece
Agree with mcncin on both these hats.