How big are those wind turbine blades ? Question from seeing wind turbines while travelling over Christmas.

Wind turbines are big!
I was impressed the one or two times I got up close to one.
From far away they looked regular big thing size. OK.
Hiking closer they looked surprisingly big even when we were not right next to them!

An initial grep of internet suggested rotor diameters were from 40m, up to ?
Rotor diameters are from 37m to 100m+ after more grepping.

Our (2-storey) house is 7m tall.
Diameter of 37m, blade of 18m = 2.5 houses tall.
Diameter of 80m, blade of 40m = 5 houses tall.
Diameter of 100m, blade of 50m = 7 houses tall.

The Nordex N117 in use on one wind farm in Ireland looks like the biggest. Rotor diameter of almost 117m.

Garracummer	2012	42.5	17	Nordex	N90	2.5	Tipperary		Bord Gais

Currently Jan 2020 there are 138 wind farms in Ireland documented in wikipedia(thanks wikipedia!) and total of 1382 turbines:

TOTALs:	Turbines Count	Wind Farms
	1382	138

--> Public Copy of my Ireland Wind Farm turbines count and info, google sheet:
https://docs.google.com/spreadsheets/d/1tlJUVPridBhH1EXt-wp8NL0FYszlA3exQWEAPSz6EJc/edit?usp=sharing

SOURCE: wikipedia and wind-turbine-models.com

https://en.wikipedia.org/wiki/List_of_wind_farms_in_the_Republic_of_Ireland
https://en.wikipedia.org/wiki/Wind_power_in_the_Republic_of_Ireland
https://en.wind-turbine-models.com

How many and how big ?
SORTED and COUNTED by turbine model:

Turbine Vendor	Model	Farm Count	Turbines Count	Rotor diameter	Tower Hub height	info
		662	7
Enercon	E-40	2	12	40.3 or 43.7 m	42/48/65 m or 50/58/65/78 m	https://en.wind-turbine-models.com/search?q=Enercon+E40
Enercon	E-44	7	22	44.0 m	45/55 m	https://en.wind-turbine-models.com/turbines/531-enercon-e-44
Enercon	E-44 and E-48	2	34
Enercon	E-48	7	30	48.0 m	50/55/60/65/76 m	https://en.wind-turbine-models.com/turbines/529-enercon-e-48
Enercon	E-53	1	1	58.6 m	59/67/70.5/89 m	https://en.wind-turbine-models.com/turbines/114-enercon-e-58-10.58
Enercon	E-70	18	149	71.0 m	58/64/70/85/98/99/113 m	https://en.wind-turbine-models.com/turbines/69-enercon-e-70-e4-2.300
Enercon	E-70 E4	1	7	71.0 m	64/85/98/99/113 m	https://en.wind-turbine-models.com/turbines/827-enercon-e-70-e4-2.000
Enercon	E-82	5	18	82.0 m	78/138 m	https://en.wind-turbine-models.com/turbines/5-enercon-e-82
Enercon	E70	2	8
Enercon	E82	1	16	82.0 m
Gamesa	G52	4	21	52.0 m	44/55/65 m	https://en.wind-turbine-models.com/turbines/45-gamesa-g52
Gamesa	G850	1	3
Gamesa	V52	1	10	52.0 m	44/55/65 m	https://en.wind-turbine-models.com/turbines/45-gamesa-g52
GE	1.5	1	4
GE	1.5s	11	151	70.5 m	64.7/80/85/100 m	https://en.wind-turbine-models.com/turbines/565-ge-general-electric-ge-1.5s
GE	1.5S	11	151	70.5 m
GE	1.5SE	1	4
GE	3.6xl	1	7
GE Energy	2.75-120	1	4
NEG Micon	NM43	1	25	43.0 m	46 m	https://en.wind-turbine-models.com/turbines/844-neg-micon-nm-43-600
Nordex	N117	1	15	116.8 m		https://en.wind-turbine-models.com/search?q=Nordex+N117
Nordex	N60	1	4	60.0 m	60/65/69/85 m	https://en.wind-turbine-models.com/turbines/77-nordex-n60
Nordex	N80	1	10	80.0 m	60/80/100/105 m	https://en.wind-turbine-models.com/turbines/89-nordex-n80-alpha
Nordex	N80/N90	1	13
Nordex	N90	8	139	90.0 m	80/100/104 m	https://en.wind-turbine-models.com/turbines/538-nordex-n90-offshore
Nordtank	NTK300	1	21	31.0 m	31/35 m	https://en.wind-turbine-models.com/turbines/48-nordtank-ntk-300
Siemens		1	38
Siemens	108-DD	1	11
Siemens	2.3VS	2	26
Siemens	SWT-2.3	1	11	?		https://en.wind-turbine-models.com/search?q=SWT-2.3
Siemens	SWT-3-0-101	2	86	101.0 m	80/115/142.5 m	https://en.wind-turbine-models.com/turbines/66-siemens-swt-3.0-101
Siemens	SWT-3.2-101	1	20	101.0 m	74.5/79.5/89.5/94/99.5 m	https://en.wind-turbine-models.com/turbines/964-siemens-swt-3.2-101
Siemens	SWT-3.4-101	1	3			?
Vestas	V105	1	4
Vestas	V112	2	20	112.0 m		https://en.wind-turbine-models.com/search?q=Vestas+V112
Vestas	V39	2	18	39.0 m	40.5 / 53 m	https://en.wind-turbine-models.com/turbines/383-vestas-v39
Vestas	V42	3	31	42.0 m	40.5/53 m	https://en.wind-turbine-models.com/turbines/109-vestas-v42
Vestas	V47	7	70	47.0 m	40/45/50/55 m	https://en.wind-turbine-models.com/turbines/13-vestas-v47
Vestas	V52	25	217	52.0 m	36.5/40/44/49/55/60/65/70/74/86 m	https://en.wind-turbine-models.com/turbines/71-vestas-v52
Vestas	V66	2	9
Vestas	V90	3	52	90.0 m	80/95/105 m	https://en.wind-turbine-models.com/turbines/16-vestas-v90
Vestas	V90 and V52	1	23
Windmaster		1	8

--> 
You can sort the list of wind farms in Wikipedia by clicking on the column heading. Sorting by Capacity to see the biggest farms:
https://en.wikipedia.org/wiki/List_of_wind_farms_in_the_Republic_of_Ireland

Wind Farm	Completed	Capacity (MW)	Turbines	Turbine Vendor	Model	Size (MW)	County	Coordinates	Operator
Galway Wind Farm	2017	169	58	Siemens	SWT-3-0-101	3	Galway		SSE / Coillte[21]
Knockacummer	2013	100	40	Nordex	N90	2.5	Cork		Greencoat Capital
Meenadreen II	2017	95	38	Nordex	N90	2.5	Donegal		Energia
Mount Lucas	2014	84	28	Siemens	SWT-3-0-101	3	Offaly
Meentycat[31]	2005	72	38	Siemens		2.3	Donegal		SSE Renewables[10]
Sliabh Bawn	2017	64	20	Siemens	SWT-3.2-101	3.2	Roscommon
Derrybrien[18]	2006	60	70	Vestas	V52	0.85	Galway		ESBI[5]
Boggeragh	2009	57	19	Vestas	V90	3	Cork
Lisheen[30]	2009	54	18	Vestas	V90	3	Tipperary		SWS[7]
Cappawhite A	2017	51.75	15	Vestas	V112	3.45	Tipperary
Bindoo[4]	2007	48	32	GE	1.5s	1.5	Cavan
Cloghboola	2015	48	16	Enercon	E82	3	Kerry
Kilgarvan[25]	2006	45	15	Vestas	V90	3	Kerry	51°56′4.69″N 9°19′33.67″W	SWS[7]
Garracummer	2012	42.5	17	Nordex	N90	2.5	Tipperary		Bord Gais
Ballywater	2006	42	21	Enercon	E-70	2	Wexford
Castledockrell	2011	41.4	18	Enercon	E-70	2.3	Wexford		Castledockrell Wind Group Limited
Coomacheo[9]	2008	41.4	18	Siemens	2.3VS	2.3	Cork		SSE Renewables[10]
Pallas	2008	40	20	Enercon	E-70	2.0	Kerry		Pallas Wind Farms Ltd
Sorne Hill	2006	38	19	Enercon	E-70	2	Donegal		Bord Gais
Carrowleagh	2012	36.8	16	Enercon	E-70	2.3	Mayo
Monaincha	2014	36	15	Nordex	N117	2.4	Tipperary		Greencoat Renewables
Raheenleagh[36]	2016	35.2	11	Siemens	108-DD	3.2	Wicklow		ESB/Coillte
Mountain Lodge	2008	34.5	23	GE	1.5s	1.5	Cavan		ESBI[5]
Glenough	2011	32.5	13	Nordex	N80/N90	2.5	Tipperary		ABO Wind
Midas[33]	2007	32.24	23	Vestas	V90 and V52	3 and 0.85	Kerry		SSE Renewables[10]
Kilgarvan Ext[25]	2009	30	13	Nordex	N90	2.3	Kerry		SWS[7]
Ballybane	2008	29.9	13	Enercon	E-70	2.3	Cork		Windprospect[2]
Dromada[19]	2009	28.5	19	GE	1.5s	1.5	Limerick		SSE Renewables[10]
Richfield[38]	2006	27	18	GE	1.5s	1.5	Wexford		SSE Renewables[10]
Tournafulla[39]	2007	27	18	GE	1.5s	1.5	Limerick		SSE Renewables[10]
Taurbeg	2006	25.3	11	Siemens	SWT-2.3	2.3	Cork		B9[1]
Arklow Bank	2004	25	7	GE	3.6xl	3.6	Wicklow
Kingsmountain[27]	2003	25	10	Nordex	N80	2.5	Sligo		SSE Renewables[10]
Carrigcannon	2010	23	10	Enercon	E-70	2.3	Cork
Knockawarriga[29]	2008	22.5	9	Nordex	N90	2.5	Limerick		SWS[7]
Gortahaile	2011	20	8	Nordex	N90	2.5	Laois		ABO Wind
Grouselodge	2011	20	8	Nordex	N90	2.5	Limerick		ESBI
Booltiagh[6]	2005	19.5	13	GE	1.5s	1.5	Clare		SWS[7]
Raheen Barr	2003	18.7	22	Vestas	V52	0.85	Mayo	53.899359°N 9.354435°W
Curragh[17]	2009	18	8	Siemens	2.3VS	2.3	Cork		SSE Renewables[10]
Moneypoint	2017	17.25	5	Vestas	V112	3.45	Clare		ESB
Tursillagh/1	2000	15.8	23	Vestas	V47	0.66	Kerry		Saorgus[35]
Barnesmore	1997	15	21	Vestas	V42	0.60	Donegal		B9[1]
Cark	1997	15	25	NEG Micon	NM43	0.6	Donegal		B9[1]
Gartnaneane[22]	2004	15	10	GE	1.5S	1.5	Cavan		SSE Renewables[10]
Gibbet Hill	2013	15	6	Nordex	N90	2.5	Wexford
Muingnaminnane	2008	14.8	18	Enercon	E-44 and E-48	0.9 and 0.8	Kerry		Saorgus[35]
Beam Hill	2008	14	8	Vestas	V66	1.75	Donegal
Meentycat Extension[32]	2009	14	7				Donegal		SSE Renewables[10]
Moanmore	2006	14	7	Enercon	E-70 E4	2	Clare
Bawnmore 2 (Carriganima)	2011	13.8	6	Enercon	E-82	2.3	Cork
Cappawhite B	2018	13.8	4	Vestas	V105	3.45	Tipperary
Killybegs	2008	13.8	6	Enercon	E-70	2.3	Donegal
Meenachullalan	2008	13.8	6	Enercon	E70	2.3	Donegal
Snugborough	2003	13.5	9	GE	1.5s	1.5	Louth
Ballincollig Hill	2009	13.3	16	Enercon	E-44 and E-48	0.9 and 0.8	Kerry	52.31044°N 9.585775°W
Culliagh[16]	2000	12	18	Vestas	V47	0.66	Donegal
Carnsore[8]	2002	11.9	14	Vestas	V52	0.85	Wexford		ESBI[5]
Bawnmore 1	2011	11.5	5	Enercon	E-82	2.3	Cork
Meenwaun	2018	11	4	GE Energy	2.75-120	2.75	Offaly		Stratkraft
Dromadda Beg	2018	10.2	3	Siemens	SWT-3.4-101	3.4	Kerry		Innogy
Gneeves[23]	2005	9.35	11	Vestas	V52	0.85	Cork		SWS[7]
Caherdowney	2012	9.2	4	Enercon	E-70	2.3	Cork
Flughland[20]	2009	9.2	4	Enercon	E-70	2.3	Donegal		SWS[7]
Tullynamoyle	2011	9.2	4	Enercon	E-70	2.3	Leitrim		Tullynamoyle Wind Farm Limited
Kealkill (Dismantled)	2006	8.5	10	Gamesa	V52	0.85	Cork
Derrynadivva	2009	8	10	Enercon	E-48	0.8	Mayo	53.910412°N 9.340825°W
Loughderryduff	2008	7.65	9	Vestas	V52	0.85	Donegal
Sonnagh Old	2004	7.65	9	Vestas	V52	0.85	Galway
Altagowlan	2005	7.6	9	Gamesa	G52	0.85	Roscommon	54°6′35.40″N 8°9′5.75″W	B9[1]
Mullananalt[34]	2008	7.5	5	GE	1.5s	1.5	Monaghan		SSE Renewables[10]
Ballymartin	2010	6.9	3	Enercon	E-82	2.3	Kilkenny		Bord Gáis Energy[3]
Cronelea	2007	6.9	3	Enercon	E-70	2.3	Wexford
Lackan	2006	6.9	3	Enercon	E-70	2.3	Sligo
Blackbanks/2	2005	6.8	8	Vestas	V52	0.85	Leitrim		ESBI[5]
Tursillagh/2	2004	6.8	23	Vestas	V52	0.85	Kerry		Saorgus[35]
Bellacorick	1992	6.45	21	Nordtank	NTK300	0.3	Mayo	54.112553°N 9.587288°W
Coomatallin[11]	2005	6	4	GE	1.5SE	1.5	Cork		SSE Renewables[10]
Knockastanna[28]	2009	6	4	GE	1.5	1.5	Limerick		SSE Renewables[10]
Milane Hill	2000	5.94	9	Vestas	V47	0.66	Cork		B9[1]
Largan Hill	2000	5.9	9	Vestas	V47	0.66	Roscommon	53.564576°N 8.333123°W	B9[1]
Lurganboy	2008	5.4	6	Enercon	E-44	0.9	Donegal
Greenoge[24]	2005	5.2	4	Nordex	N60	1.3	Carlow		Greenoge Windfarm Ltd
Crockahenny[14]	1998	5.0	10	Enercon	E-40	0.5	Donegal		ESBI[5]
Geevagh	2006	5	6	Gamesa	G52	0.85	Sligo		B9[1]
Kilronan[26]	1998	5	10	Vestas	V39	0.5	Roscommon	54.43066°N 8.8427°W
Corrie Mt.	1997	4.8	8	Vestas	V42	0.6	Leitrim		Eco Wind Power[13]
Cronalaght 1&2	1997	4.8	8	Vestas	V39	0.6	Donegal
Drumlough	1997	4.8	8	Windmaster		0.6	Donegal		B9[1]
Carrons	2010	4.6	2	Enercon	E-82	2.3	Limerick
Clydaghroe	2012	4.6	2	Enercon	E70	2	Cork
Lacka Cross	2009	4.6	2	Enercon	E-82	2.3	Kerry
Seltannaveeny	2010	4.6	2	Enercon	E-70	2.3	Leitrim
Sheeragh	2008	4.6	2	Enercon	E-70	2.3	Donegal
Skrine	2011	4.6	2	Enercon	E-70	2.3	Roscommon
Kilvinane	2006	4.5	3	Gamesa	G850	0.85	Cork
Lenanavea	2010	4.5	5	Enercon	E-44	0.9	Mayo	53.924083°N 9.350513°W
Lahanaght Hill	2006	4.25	5	Vestas	V52	0.85	Cork
Moneenatieve	2005	4.25	2	Gamesa	G52	0.85	Leitrim		B9[1]
Skehanagh	2006	4.25	5	Vestas	V52	0.85	Tipperary
Rahora	2008	4	5	Enercon	E-48	0.8	Cork
Reenascreena	2009	4.0	5	Enercon	E-48	0.8	Cork
Beenageeha	2000	3.96	6	Vestas	V47	0.66	Kerry		B9[1]
Inverin 1&2	1999	3.96	4	Vestas	V47	0.66	Galway
Blackbanks/1	2001	3.4	4	Vestas	V52	0.85	Leitrim		ESBI[5]
Caranne Hill	2008	3.4	4	Gamesa	G52	0.85	Sligo		ESBI[5]
Cuillalea	2004	3.4	4	Vestas	V52	0.85	Mayo	53.848557°N 9.071226°W
Meenadreen	2003	3.4	4	Vestas	V52	0.85	Donegal		B9[1]
Meenanilta 3	2004	3.2	4	Enercon	E-48	0.80	Donegal
Corneen[12]	2001	3	2	GE	1.5S	1.5	Cavan		SSE Renewables[10]
Mountain Lodge II	2009	3	2	GE	1.5s	1.5	Cavan		ESBI[5]
Cornacahan	2007	2.7	3	Enercon	E-44	0.9	Donegal
Shannagh	2009	2.7	3	Enercon	E-44	0.9	Donegal
Ballinlough/Ikerrin	2006	2.55	3	Vestas	V52	0.85	Tipperary	52.830021°N 8.011333°W
Ballinveny	2006	2.55	3	Vestas	V52	0.85	Tipperary	52°49′31.4″N 7°56′18.5″W
Beal Hill/2	2003	2.55	3	Vestas	V52	0.85	Kerry
Carrigh	2006	2.55	3	Vestas	V52	0.85	Tipperary
Cronelea Upper[15]	2005	2.55	3	Vestas	V52	0.85	Wicklow
Curraghgraigue	2004	2.55	3	Vestas	V52	0.85	Tipperary
Meenanilta	2004	2.55	3	Vestas	V52	0.85	Donegal
Mace Upper	2009	2.4	3	Enercon	E-48	0.8	Mayo	53.770843°N 8.969715°W
Glackmore	2008	2.3	1	Enercon	E-70	2.3	Donegal
Slievereagh	2009	2.3	1	Enercon	E-70	2.3	Limerick
Cronelea Upper		1.8	2	Enercon	E-44	0.9	Wicklow
Dunmore	2009	1.8	2	Enercon	E-44	0.9	Louth
Beallough	2008	1.7	2	Vestas	V52	0.85	Waterford
Drybridge/Dunmore	2006	1.7	2	Vestas	V52	0.85	Louth
Mienvee(I and II)	2004	1.7	1	Vestas	V52	0.85	Tipperary		SWS[7]
Mount Eagle 2	2008	1.7	2	Vestas	V52	0.85	Kerry
Beal Hill/1	2000	1.65	1	Vestas	V66	1.65	Kerry
Crocane	2010	1.6	2	Enercon	E-48	0.8	Cork	51.843118°N 8.156640°W
Anarget	2004	1.2	2	Enercon	E-40	0.6	Donegal	54.5907°N 8.0697°W
Spion Kop	1997	1.2	2	Vestas	V42	0.6	Leitrim
Anarget Extension	2007	0.9	1	Enercon	E-44	0.9	Donegal
Dundalk IT	2005	0.85	1	Vestas	V52	0.85	Louth		DIT
Astellas	2011	0.8	1	Enercon	E-53	0.8	Kerry
Rathmooney[37]	2009	0.8	1	Enercon	E-48	0.8	Dublin	53.549924°N 6.175515°W
Burtonport	2003	0.66	1	Vestas	V47	0.66	Donegal